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JavaScript - Chrome Console.log Method Has Some Confused Problems
I use console.log to print the dom element info, but some results make me very confused.The code is below, you can paste it to a file and browse it.
//********************** <html> <head> </head> <body> <script type="text/javascript"> function showObjInPage(obj) { document.write("=======================================<br/>"); document.write((typeof obj) + "<br/>"); document.write("length: " + obj.length + "<br/>"); ///!!! 0, may ok document.write(obj); //!!!!!write nothing for (var prop in obj) { document.write(prop + " = " + obj[prop] + "<br/>"); } document.write("=======================================<br/>"); } function consoleLog(obj) { console.log("=======================================<br/>"); console.log((typeof obj) + "<br/>"); console.log("length: " + obj.length + "<br/>"); //!!!!! this is the confuse, it is 0, but the code below show obj correct! console.log(obj); //!!! write all the p elements for (var prop in obj) { console.log(prop + " = " + obj[prop] + "<br/>"); } console.log("=======================================<br/>"); } var elems = document.getElementsByTagName('p'); //console.log(elems); //console.log(elems.length); showObjInPage(elems); consoleLog(elems); </script> <p>p1</p> <p>p2</p> <p>p3</p> <p>p4</p> </body> </html> I want to print the p elements info use console.log, it is ok to log the elems, but the elems's length is 0, so it is not consistent! Maybe my code need to write after the 'p' element, but the problem is very confused. Is it a chrome console.log bug or just I do something wrong? Similar Tutorialsi'm working with a javascript on a drupal website, but the saving function seems to work only as soon as i click 2 times on the "save" button. the code that fires the function is: Code: var param ="&usuario="+usuario+"&nivel="+nivel+gano+porc_gano+gasto+porc_gasto+tengo+porc_tengo+debo+ porc_debo+plazo_debo;
var s = document.createElement("script");
s.type = "text/javascript"; s.async = true;
s.src = server_direction +"setMisDatos?callback=respuestaGuardarMisDatos¶m="+encodeURIComponent(param);
var h = document.getElementsByTagName("script")[0];
h.parentNode.insertBefore(s, h); //or h.appendChild(s);
the chrome console tells me the error is in the last line i copied, but i don't undertand what kind of error it is. using chrome console (specifically the "network" one), i see that it's written in red, status/text "failed", type "undefined" size/content "13 B / 0 B"; when it works it's: status/text "200/OK", type "text/json", size/content "256 B/ 38B". i'm not an expert with this, is there some more information that could be useful? the code fires a netbeans function, that stores data to a postgresql database, so i have like 100 variables that has to be stored when i click on the "save button". Actually before i put parentNode.insertBefore, there used to be appendChild(s), but then i found out this algorithm from google analytics, which seems to be working better than the previous one. Having said that, i can tell you that the GET works after the first time i click perfectly, with some weird things happening, like if i browse another tab for a while, then go back to the page, and click on save, it won't work again (same error). The variables are written like this: Code: var plazo_debo_casa1 = (getValor("plazo_debo_casa1"));
var plazo_debo_casa2 = (getValor("plazo_debo_casa2"));
var plazo_debo_casa3 = (getValor("plazo_debo_casa3"));
var plazo_debo_prestamo1 = (getValor("plazo_debo_prestamo1"));
var plazo_debo_prestamo2 = (getValor("plazo_debo_prestamo2"));
var plazo_debo_prestamo3 = (getValor("plazo_debo_prestamo3"));
var plazo_debo ="&plazo_debo_casa1="+plazo_debo_casa1+"&plazo_debo_casa2="+plazo_debo_casa2+"&plazo_debo_casa3="+plazo_debo_casa3+"&plazo_debo_prestamo1="+plazo_debo_prestamo1+"&plazo_debo_prestamo2="+plazo_debo_prestamo2+"&plazo_debo_prestamo3="+plazo_debo_prestamo3;
and then together in the "param" variable. Is it clearer now? i tried to copy document.head.appendChild(s); instead of parentNode.insertBefore(s,h), but it still behaves the same way. Still not any suggestions? This is part of the javascript file loading on my page, and since the function setMisDatos is in netbeans and it works correctly as soon as it's fired (at least, that's what i notice after the first click), i don't think it's worth copying part of it here, right? are there maybe too many variables for the GET method? is there a way to check GET errors? i'm sorry for not being an expert but i would really like some help here. Hello all, I'm back with more silly newbie questions. I'm building a website that includes 3 javascript codes: 1. Onmouseover image switch for the nav bar. 2. On a specific page, onmouseover display of hidden divs. 3. Particletree's Dynamic Resolution Dependent Layout script (http://particletree.com/features/dyn...ndent-layouts/) All three scripts work fine in firefox, but the 2nd script doesn't work in safari and chrome, and the 3rd one doesn't work in safari, chrome and IE(8). Since the 1st one works fine in all browsers, I'm guessing this isn't a problem with my javascript link or anything like that. The website is: www.sheket.co.il/index4.html The specific page that runs the 2nd code is: www.sheket.co.il/services.html My javascript is: http://www.sheket.co.il/javascript.js And my default stylesheet is: http://www.sheket.co.il/style.css (I apologize for possible jibrish- the website is in Hebrew...) Any help with these two problems would be greatly appreciated! I would like to have a button just like for firebug, for error console, and that it would open error console window like for firebug. Is there a setting for that in FF, or some kind of addin outthere ?
What can I do to find out what the errors in the error console mean?
I'm working with greasymonkey scripts. Firefox JS console would always display GM script errors, but all of the sudden it stopped doing that. Script just won't load and no errors are displayed. I didn't touch any settings, yesterday they were showing fine, today none are displayed. Would appreciate any help.
Hello, Error Console tells me : exp is null Line 10 This does not make any sense to me. Could someone look at the short script below and tell me why I get this message? I know how to make this script work, but I just want to understand why function changePar cannot access the variable exp in the script below. Thank you very much. <code> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title> Exercise 2</title> <meta http-equiv="content-type" content="text/html;charset=UTF-8" /> <script type="text/javascript"> exp=document.getElementById("experiment"); function changePar() { exp.getElementsByTagName("button")[0].onclick=function() { document.getElementById("changingParagraph").innerHTML="Hello World"; } } window.onload=changePar; </script> </head> <body> <div id="experiment"> <button>Click Here</button> </div> <p id="changingParagraph"></p> </body> </html> </code> Hi, i'm having problems with my console game, when i type in help when testing it just doesn't do anything, it's probarly a stupid mistake but i can't find what i did wrong :s index.html code Code: <html> <head> <script type="text/javascript" src="scripts/jquery.js"></script> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Console Game Project</title> </head> <body> <div id="console"> <p id="message_startgame">Welcome to Nieli's game! To control the game you must type in commands</p> <p id="area_northcorridor">You are in the north door. There is a sword on the ground.</p> <p id="message_help" style="display: none;">Here is a list of commands</p> <!-- PLACEHOLDER: THIS IS WHERE EVERYTHING WILL BE INSERTED BEFORE --> <div id="placeholder"></div> <form onsubmit="return false;"> <input type="text" size="50" autofocus="autofocus" id="command_line" /> </form> </div> <script type="text/javascript" src="scripts/game.js"></script> </body> </html> game.js code Code: //been to variables
beentonorthdoor = true;
//
//Item variable
sword = false;
//
//Current room
currentroom = "n_corridor";
//
$(document).ready(function() {
$("form").submit(function() {
var input = $("#command_line").val();
if (input == "help") {
$("#message_help").clone().insertBefore("#placeholder").fadeIn(1000);
}
$("#command_line").val("");
}};
}};
I have on my website ( www.nieeli.com/game/ ) the index.html, then a folder scripts with jquery.js and game.js in.. Could anyone help me Oh, just noticed there is a Jquery help section... Sorry Why is the callwhy is the slice method only a method of an Array instance? The reason why I ask is because if you want to use it for the arguments property of function object, or a string, or an object, or a number instance, you are forced to use Array.prototype.slice.call(). And by doing that, you can pass in any type of object instance (Array, Number, String, Object) into it. So why not just default it as a method of all object instances built into the language? In other words, instead of doing this: Code: function Core(){
var obj = {a : 'a', b : 'b'};
var num = 1;
var string = 'aff';
console.log(typeof arguments);//Object
console.log(arguments instanceof Array);//false
var args1 = Array.prototype.slice.call(arguments);
console.log(args1);
var args2 = Array.prototype.slice.call(obj);
console.log(args2);
var args3 = Array.prototype.slice.call(num);
console.log(args3);
var args4 = Array.prototype.slice.call(string);
console.log(args4);
Core('dom','event','ajax');
Why not just be able to do this: Code: function Core(){
var obj = {a : 'a', b : 'b'};
var num = 1;
var string = 'aff';
var args = arguments.slice(0);
var args2 = obj.slice(0);
var args3 = num.slice(0);
var args4 = string.slice(0);
//right now none of the above would work but it's more convenient than using the call alternative.
}
Core('dom','event','ajax');
Why did the designers of the javascript scripting language make this decision? Thanks for response. Since the upgrade from chrome 9 to chrome 10 my script is showing an error in my variables when i use boolean expressions. they changed to version V8, Chrome's JavaScript engine. Here is the function function get_form_value(n){ e=document.getElementById(n); if ((e.value)&&(e.value != "")&&(!e.options)) return e.value; if ((e.selectedIndex)&&(e.selectedIndex>0) &&(e.options[e.selectedIndex].value !="")) return e.options[e.selectedIndex].value; // select if ((e.text)&&(e.text.value !="")) continue; if ((e.selectedIndex)&&(e.selectedIndex>0) &&(e.options[e.selectedIndex].text !="")) return e.options[e.selectedIndex].text; // select if ((e.checkbox)&&(e.checkbox.checked)) return true; return false; } When i run it it shows a syntax error: Can someone please help me fix this? var n = 123456.789; n.toFixed(0); just starting out JavaScript. So i type the above code in firebug. it returns this result:- "123457" As for as i know, toFixed() converts a number to a string with a specified number of digits after the decimal point. If i have specified 0, which i'm assuming it means 0 digits after the decimal point, why does the 7 appear and the 6 is taken out. really fustrating and can't seem to get my head over it. Hey i got this code and i looked at it and im so lost i cant describe it can someone hep me in understanding the ins and outs of this. Code: var YOOaccordion=new Class({initialize:function(togglers,elements,options){this.setOptions({open:'first',allowMultipleOpen:false,fade:false,fadeDuration:600,transition:Fx.Transitions.linear,duration:400},options);this.togglers=togglers;this.elements=elements;this.elementFx=[];this.elementVisible=[];this.togglers.each(function(tog,i){tog.addEvent('click',function(){this.toggleSection(i)}.bind(this))},this);this.elements.each(function(el,i){this.elementFx[i]=new Fx.Slide(el,this.options);if(!(this.options.allowMultipleOpen&&this.options.open=='all'))this.hide(i)},this);if(this.options.open=='first')(function(){this.slideIn(0)}).delay(1,this)},toggleSection:function(iToToggle){if(!this.options.allowMultipleOpen){this.elements.each(function(el,i){if(this.elementVisible[i]&&i!=iToToggle)this.slideOut(i)},this)}this.toggle(iToToggle)},toggle:function(i){this.elementFx[i].toggle().chain(function(){this.elementVisible[i]=(this.elementVisible[i]+1)%2}.bind(this));if(this.options.fade)this.fade(i)},slideIn:function(i){this.elementFx[i].slideIn().chain(function(){this.elementVisible[i]=1}.bind(this));if(this.options.fade)this.fade(i)},slideOut:function(i){this.elementFx[i].slideOut().chain(function(){this.elementVisible[i]=0}.bind(this));if(this.options.fade)this.fade(i)},show:function(i){this.elementVisible[i]=1;this.elementFx[i].show()},hide:function(i){this.elementVisible[i]=0;this.elementFx[i].hide()},fade:function(i){var fx=new Fx.Styles(this.elements[i],{'duration':this.options.fadeDuration,'wait':false});fx.start({'opacity':[this.elementVisible[i],(this.elementVisible[i]+1)%2]})}});YOOaccordion.implement(new Options);
I trying to display a random number using innerHTML Here's my code: Code: <html>
<head>
<script language="JavaScript">
var myArray = new Array("String1", "String2", "String3", "String4", "String5", "String6", "String7", "String8", "String9", "String10");
var num = Math.floor(myArray.length * Math.random());
document.writeln(myArray[num]);
//document.getElementById("myString").innerHTML = myArray[num];
</script>
</head>
<body>
<div id="myString"></div>
</body>
</html>
it works when I use document.writeln(myArray[num]); but does NOT work for document.getElementById("myString").innerHTML = myArray[num]; any ideas?? tks First let me say, I do know how to code I just haven't for a VERY long time and things are slow to come back. That being said, I'm working on a self induced project to bring back my coding abilities and I'm stuck. What I'm wanting to happen is when a certain link is clicked it goes to a certain photo album and pulls random pics just from that album and displays them in a certain place on that page. What would be the best way to approach this to make it happen? I'm not wanting someone to do this for me, just get me going in the right direction. Thanks.... Strange problem here... I'm implementing google's JS tracking code verbatim which determines whether or not the current site is using HTTP or HTTPS. It builds a dynamic URL used as the "SRC" parameter in the SCRIPT statement. On browsers I'm testing with(FF, IE, Chrome) there's no problem running the code. However, there are some people in the office who get an FF or IE error (same versions as mine) on the URL as the SRC parameter. The error, in the FF Error Console, is this: Quote: illegal character http://www.google-analytics.com/ga.js ? ? ? ? --> question marks appear in console I can't figure it out since I can't create this error on any of my browsers. Could this be related to something like browser security settings or add-ons? I'm picking up some work on a site that has been built already in joomla! On some of the pages IE is breaking it and pushing it down to the bottom. example:LINK TO BREAKAGE That Volleyball tag should be up next to the picture. And there is an entire paragraph underneath that that is not getting seen. Someone told me at first that it was the javascript, and I thought it was the Rokbox plugin, but that's not even activated. I am so confused. And it's not the css, because I tried that. Has anyone else experienced this problem? And how is it fixed? I have been working on it all weekend! Thank you for all comments! Hi - In am learning Javascript and trying to understand why, the following line : Code: arguments.callee.superclass cannot be replaced by : Code: this.constructor.superclass In the following code sample : ( the explanation given is that if someone creates a subclass of PositionedRectangle, then this.constructor will refer to the new subclass constructor, not to PositionedRectangle - but why? 'this' here to my knowledge represents the object 'PositionRectangle' and if not I can't understand why not. ) Code: // Here is a simple Rectangle class.
// It has a width and height and can compute its own area
function Rectangle(w, h) {
this.width = w;
this.height = h;
}
Rectangle.prototype.area = function( ) { return this.width * this.height; }
// Here is how we might subclass it
function PositionedRectangle(x, y, w, h) {
// First, invoke the superclass constructor on the new object
// so that it can initialize the width and height.
// We use the call method so that we invoke the constructor as a
// method of the object to be initialized.
// This is called constructor chaining.
PositionRectangle.superclass = Rectangle;
arguments.callee.superclass .call(this, w, h);
// Now store the position of the upper-left corner of the rectangle
this.x = x;
this.y = y;
}
// Create a prototype for the subclass that inherits from the prototype
// of the superclass.
function heir(p) {
function f(){}
f.prototype = p;
return new f();
}
PositionRectangle.prototype = heir(Rectangle.prototype);
PositionRectangle.prototype.constructor = PositionRectangle;
The situation: I have a javascript scroller that loads it's data via JQuery .load function (code not listed as it is not relevant to the problem.) The amount of data loaded is greater than what is shown (each piece of data in it's own div with id's from #scroller1 to #scroller20). So you can see the first 13 div's right away and the other 7 are scrolled in 1 by one as the first 7 are scrolled out 1 by 1 in an endless and consecutive loop. The problem: For some reason, after div20 (#scroller20) is scrolled in to view, my scroller removes div8 but does not add div1 creating a blank space below div9 (if this confuses you, take a look at the link at the bottom of this post.) After div20 is removed, then div13 is added but div1 is NOT removed, now filling this blank space. Now normally this is not visible to be a problem, except that each of these div's will end up being much higher, perhaps only 4 showing at a time, so when one of these 4 disappears, then reappears, it will become unacceptable. Why is this happening? I am sure it has to the code/math inside of function divage... but I can't figure it out for some reason... please help. Here is my javascript code (which uses JQuery) Code: var slide = 1;
var auto_scroll = setInterval("scrollme(slide++)", 4000);
function scrollme(i){
divage(i);
}
function divage(i){
removeIt(i%21);
addIt((i+13)%21);
var j=((i-1)%21);
$('#scroller-main-text').prepend($("#scroller"+j));
}
function addIt(i){
$("#scroller"+i).fadeIn(1000);
}
function removeIt(i){
$("#scroller"+i).fadeOut(500);
}
URL where the problem can be witnessed: http://www.inspiritandintruth.com Hi there coding friends, im stuck again this time on arrays.. Im trying to get my head around it and im sure it's one of those things you do once you know what your doing (to an extent) now the problem is... i have 2 arrays for a experiment one = flowerheight and the other is flowernumbers. now the height is set out as 15,16,17,18,19 and numbers 2,1,6,4,2 what the aim is in the first part is to times the height by numbers of the corresponding array ie. 15x2 16x1 17x6 18x4 19x2 to make a 3rd array with them as the totals then the second part of the program is to calculate the average height i.e total of total of numbers array (2+1+6+4+2) + total of 3rd array(15x2+16x1+17x6+18x4+19x2) then a write to show what the total was.. now all I have of the code is... Code: <HTML> <HEAD> <TITLE> Flower Experiment </TITLE> <SCRIPT LANGUAGE = "JavaScript"> /* * Program to calculate average height of flowers.. */ //Experiment results var flowerHeights = [15,16,17,18,19]; var flowerNumbers = [2,1,6,4,2]; //Write code to work out and show flowerheightxnumbers. //Write code to calculate the average height of the flowers (total of flowernumbers + (flowerheight X numbers) and write it out in the browser window. </SCRIPT> </HEAD> <BODY> </BODY> </HTML> now I have no idea how to go about this it's making me loose my mind. Can someone start me off in the right directon and/or explain to me what to do. Anyhelp much appreciated, I wish I could have done more to the question to make it easier for you lot to help me but my brain is frazzled Thanks. James Hi, thanks for reading this. I have two templates that I use on my website that use font faces.....(both of these templates were free downloads). However, if I look at the files for each of these templates, they use font face differently - can someone kindly check if they are ok? Is one wrong and one right? Template 1: Which works 100% well in all browsers There is NO css reference, rather, each page has this javascript: <script type="text/javascript" src="../jsfunnels/cufon-yui.js"></script> <script type="text/javascript" src="../jsfunnels/MgOpen_Moderna_700.font.js"></script> <script type="text/javascript" src="../jsfunnels/Chunk_400.font.js"></script> <!-- Start Video section --> <script type="text/javascript"> Cufon.replace('h1', { fontFamily: 'Chunk' }); Cufon.replace('h2', { fontFamily: 'Chunk' }); Cufon.replace('h3', { fontFamily: 'Chunk' }); Cufon.replace('h7', { fontFamily: 'Chunk' }); Cufon.replace('h4', { fontFamily: 'MgOpen Moderna' }); Cufon.replace('h6', { fontFamily: 'MgOpen Moderna' }); </script> Template 2: Which works 70% well in all browsers <script type="text/javascript" src="js/cufon-yui.js"></script> <script type="text/javascript" src="js/TitilliumMaps26L_500.font.js"></script> <script type="text/javascript" src="js/TitilliumMaps26L_300.font.js"></script> <script type="text/javascript" src="js/jquery.js"></script> <script type="text/javascript" src="js/scripts.js"></script> <script type="text/javascript"> Cufon.replace('.footer span','.footer span a',{ fontFamily: 'TitilliumMaps26L-250wt'}); Cufon.replace('.col-left p',{ fontFamily: 'TitilliumMaps26L-250wt'}); Cufon.replace('.reg a',{ fontFamily: 'TitilliumMaps26L-250wt'}); Cufon.replace('.content4-left p',{ fontFamily: 'TitilliumMaps26L-250wt'}); Cufon.replace('.content4-right p.title',{ fontFamily: 'TitilliumMaps26L-250wt'}); Cufon.replace('.header-right','.search span','.header-right ul li a',{ fontFamily: 'TitilliumMaps26L-500wt'}); Cufon.replace('h1',{ fontFamily: 'TitilliumMaps26L-500wt'}); </script> And the CSS which I believe is the culprit is he @font-face { font-family: 'TitilliumMaps26L002'; src: local('../font/TitilliumMaps26L002-250wt') url('../font/TitilliumMaps26L002.otf') format('opentype'); } ------------------ Now, according to Paul Irish article, I should NOT make the above CSS a local path - see the red font above. So I guess my questions are, can anyone see anything wrong with the above, and why is there a different approach, i.e. one uses css and the other doesn't? THANKS VERY MUCH |
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