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    <p>I think that your question can't have <em>only one</em> correct answer. There are many ways of writing long strings in JavaScript and it's mostly the matter of taste which one you choose. I can just describe here my point of view on the subject.</p> <p>First of all you can use <code>maxlen</code> option of JSlint to change the default line length to any value which you like. For example</p> <pre><code>/*jslint maxlen: 130 */ </code></pre> <p>But I think you know the setting already.</p> <p>I suppose that you can use some Minifiers of the JavaScript code for productive usage of your JavaScripts (like <a href="https://developers.google.com/closure/compiler/" rel="nofollow">Closure Compiler</a>, <a href="http://ajaxmin.codeplex.com/" rel="nofollow">Microsoft Ajax Minifier</a> or some other). How you can easy verify on <a href="http://closure-compiler.appspot.com/home" rel="nofollow">the page</a> the code</p> <pre><code>// ==ClosureCompiler== // @compilation_level SIMPLE_OPTIMIZATIONS // @output_file_name default.js // ==/ClosureCompiler== // ADD YOUR CODE HERE function hello(name) { var test = '&lt;div&gt;' + '&lt;h1&gt;Foo&lt;/h1&gt;' + '&lt;p&gt;Lorem ipsum&lt;/p&gt;' + '&lt;/div&gt;'; return test + name; } hello('New user'); </code></pre> <p>will be minified to</p> <pre><code>function hello(a){return"&lt;div&gt;&lt;h1&gt;Foo&lt;/h1&gt;&lt;p&gt;Lorem ipsum&lt;/p&gt;&lt;/div&gt;"+a}hello("New user"); </code></pre> <p>and all the string constants will be concatenated. So you can format the code with the long string constants mostly so, that <em>the code could be better read</em>. The minifier will do the rest of the work for you.</p> <p>In the case of long URLs you can break long strings on any place which you find best from a logical point of view (I think it will always be on some <code>'/'</code> character). In most practical cases you have some <code>baseURL</code> which will be appended. So you can define the common project settings somewhere at the beginning of your file or in the separate JavaScript file</p> <pre><code>var baseLoremUrl = 'http://example.com/foo/bar/baz/fizz/buzz/lorem/'; </code></pre> <p>and use it later as</p> <pre><code>'&lt;a href="' + baseLoremUrl + 'ipsum/etc/' + '"&gt;Click me!&lt;/a&gt;' </code></pre> <p>If you have parameters which should be appended to URL like</p> <pre><code>'http://example.com/foo/bar/baz/fizz/buzz/lorem?x=123&amp;y=ABC' </code></pre> <p>I use always</p> <pre><code>baseLoremUrl + '?' + $.params({x: 123, y: 'ABC'}) </code></pre> <p>to make the code more readable from one side and to be sure that all parameters will be correctly encoded with respect of <a href="http://www.w3schools.com/jsref/jsref_encodeURIComponent.asp" rel="nofollow">encodeURIComponent</a> if it's needed.</p> <p>All above are the rules which I try to follow myself during writing my JavaScript code.</p>
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