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Deep cloning vs setting of innerHTML: what's faster?

由 牧云@^-^@ 提交于 2020-01-09 06:20:33
问题 I'm trying to figure out the most performant way of deep-cloning a DOM tree within the browser. If I start out with var div = document.getElementById("source"); var markup = div.innerHTML; What will be faster, var target = div.cloneNode(true); or var target = document.cloneNode(false); target.innerHTML = markup; I understand the browser platform may make a big difference here, so any information about how these compare in the real world would be appreciated. 回答1: Let's test! I added the

Deep cloning vs setting of innerHTML: what's faster?

由 最后都变了- 提交于 2020-01-09 06:20:09
问题 I'm trying to figure out the most performant way of deep-cloning a DOM tree within the browser. If I start out with var div = document.getElementById("source"); var markup = div.innerHTML; What will be faster, var target = div.cloneNode(true); or var target = document.cloneNode(false); target.innerHTML = markup; I understand the browser platform may make a big difference here, so any information about how these compare in the real world would be appreciated. 回答1: Let's test! I added the

decodeURIComponent vs unescape, what is wrong with unescape?

由 杀马特。学长 韩版系。学妹 提交于 2020-01-09 02:00:28
问题 In answering another question I became aware that my Javascript/DOM knowledge had become a bit out of date in that I am still using escape / unescape to encode the contents of URL components whereas it appears I should now be using encodeURIComponent / decodeURIComponent instead. What I want to know is what is wrong with escape / unescape ? There are some vague suggestions that there is some sort of problem around Unicode characters, but I can't find any definite explanation. My web

decodeURIComponent vs unescape, what is wrong with unescape?

由 随声附和 提交于 2020-01-09 01:59:35
问题 In answering another question I became aware that my Javascript/DOM knowledge had become a bit out of date in that I am still using escape / unescape to encode the contents of URL components whereas it appears I should now be using encodeURIComponent / decodeURIComponent instead. What I want to know is what is wrong with escape / unescape ? There are some vague suggestions that there is some sort of problem around Unicode characters, but I can't find any definite explanation. My web

decodeURIComponent vs unescape, what is wrong with unescape?

由 无人久伴 提交于 2020-01-09 01:58:26
问题 In answering another question I became aware that my Javascript/DOM knowledge had become a bit out of date in that I am still using escape / unescape to encode the contents of URL components whereas it appears I should now be using encodeURIComponent / decodeURIComponent instead. What I want to know is what is wrong with escape / unescape ? There are some vague suggestions that there is some sort of problem around Unicode characters, but I can't find any definite explanation. My web

How to resize html canvas element?

由 最后都变了- 提交于 2020-01-08 19:47:48
问题 I have a canvas element defined statically in the html with a width and height. If I attempt to use JavaScript to resize it dynamically (setting a new width and height - either on the attributes of the canvas or via the style properties) I get the following error in Firefox: uncaught exception: [Exception... "Illegal operation on WrappedNative prototype object" nsresult: "0x8057000c (NS_ERROR_XPC_BAD_OP_ON_WN_PROTO)" location: "JS frame :: file:///home/russh/Desktop/test.html :: onclick ::

Event Handler loose event in Firefox when AJAX DHTML

由 送分小仙女□ 提交于 2020-01-06 10:09:10
问题 I have a problem with an event handler used to resort a table with the tab key putting an input cel or an select box in it to edit data in MySQL The method is captured by the event handler, the key pressed is validated, if TAB, it will continue with data validation if valid, it reach the database to uptade search for the next valid cell to insert either an nput or a select box. The problem is that the code is not working in Firefox. When the row ends and it have to insert the select box the

Linked Dynamic Radio Buttons HTML Javascript

由 落爺英雄遲暮 提交于 2020-01-06 08:12:17
问题 All, Have used this site a few times before and had some great replies so hopefully someone can help again. I want a set of radio buttons, so that when you click a button - you get another set below it. Then again, when you click one of the 2nd set of buttons, you'll get a third etc. Currently I have the following: <html> <head> <title>My Wizard</title> <script language="javascript"> function Display(question) { h1=document.getElementById("yes"); h2=document.getElementById("no"); h3=document

How to store dyanamic value into jquery cookie variable

由 让人想犯罪 __ 提交于 2020-01-03 02:51:06
问题 How can we store dynamic variables into cookie . var username = ($("#username").val()); how to store the variable username into jquery cookie variable $.cookie('username', '+username +'); alert($.cookie('username')); 回答1: If you put within a single quotes it takes only string.So for this you don't need the single quotes for assigning the value. Try this $(document).ready(function() { var username = ($("#username").val()); $.cookie('username', username ); alert($.cookie('username')); }); It

Javascript: Have body onload function wait until scripts have completed

由 北城以北 提交于 2020-01-02 07:48:27
问题 I have some functions that I am calling and they take some time (milliseconds), but I don't want the page to display until these functions have completed. Right now, I can tell that the page loads and then the scripts eventually complete. Right now, I am calling the functions in the body onload. Also, another issue I may have is that I need to access div elements in the html content, can I do that in my body onload function (getElementById('somDiv')? Here is the workflow. Make a call to
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