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<h1>Debug dictionary JS</h1>
<h2 id="background">background</h2>
<p>When some js functions do not work as expected, this article tries to give a debug solution to pinpoint the problem.</p>
<h2 id="web-inspector-devtools">Web inspector (DevTools)</h2>
<p>GoldenDict-ng has embedded an inspector, which is actually <a href="https://developer.chrome.com/docs/devtools">chromium's DevTools</a>. You can trigger it manually using <code>F12</code>.</p>
<p>Screenshot:
<img alt="Inspector" src="../../img/inspector.png" /></p>
<h2 id="navigate-to-the-specified-element">Navigate to the specified element</h2>
<p>Click the find element and move mouse to the specified element, click the element will navigate the source panel to the very place.
<img alt="steps" src="../../img/inspector-steps.png" /></p>
<h2 id="modify-the-css-style">Modify the css style</h2>
<p>you can play around with the css to modify the appearance of the html and check the results.</p>
<p><img alt="style" src="../../img/inspector-style.png" /></p>
<h2 id="check-javascript-events">Check javascript events</h2>
<ul>
<li>navigate to the specified element</li>
<li>check eventlisterner panel</li>
<li>pay attention to the click events</li>
<li>in the following screenshot ,there are two registered event listeners, one from the goldendict <code>gd-custom.js</code> and one from the html itself.</li>
<li>click the above event listener location will locate to the right place in the javascript.</li>
</ul>
<p><img alt="event" src="../../img/inspector-event.png" /></p>
<p>If some desired event does not triggered , it can first check does the event listeners has been successfully registered. then set a breakpoint in the right place to check whether the event has been triggered and if it can executed successfully.
<img alt="breakpoint" src="../../img/inspector-breakpoint.png" /></p>
<h2 id="reproduce-the-issues">Reproduce the issues</h2>
<p>following your normal operations and debugging the javascript code and pay attention to the console output. Whether any errors happened.
<img alt="Alt text" src="../../img/inspector-console.png" /></p>
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