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54 lines
2 KiB
Markdown
54 lines
2 KiB
Markdown
# How to debug dictionary javascript
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- [How to debug dictionary javascript](#how-to-debug-dictionary-javascript)
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- [background](#background)
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- [goldendict-ng inspector](#goldendict-ng-inspector)
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- [How to navigate to the specified element](#how-to-navigate-to-the-specified-element)
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- [Modify the css style](#modify-the-css-style)
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- [check javascript events](#check-javascript-events)
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- [reproduce the issue in the goldendit](#reproduce-the-issue-in-the-goldendit)
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## background
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When some js functions do not work as expected, this article tries to give a debug solution to pinpoint the problem.
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## goldendict-ng inspector
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Goldendict-ng has embedded an inspector, you can trigger it manually using `F12`.
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Screenshot:
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## How to navigate to the specified element
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Click the find element and move mouse to the specified element, click the element will navigate the source panel to the very place.
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## Modify the css style
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you can play around with the css to modify the appearance of the html and check the results.
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## check javascript events
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- navigate to the specified element
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- check eventlisterner panel
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- pay attention to the click events
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- in the following screenshot ,there are two registered event listeners, one from the goldendict `gd-custom.js` and one from the html itself.
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- click the above event listener location will locate to the right place in the javascript.
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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.
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## reproduce the issue in the goldendit
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following your normal operations and debugging the javascript code and pay attention to the console output. Whether any errors happened.
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