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How to fix Uncaught SyntaxError: Failed to execute ‘querySelector’ on ‘Document’ error with JavaScript?

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Sometimes, we want to fix Uncaught SyntaxError: Failed to execute ‘querySelector’ on ‘Document’ error with JavaScript.

In this article, we’ll look at how to fix Uncaught SyntaxError: Failed to execute ‘querySelector’ on ‘Document’ error with JavaScript.

How to fix Uncaught SyntaxError: Failed to execute ‘querySelector’ on ‘Document’ error with JavaScript?

To fix Uncaught SyntaxError: Failed to execute ‘querySelector’ on ‘Document’ error with JavaScript, we should make sure we call it with a valid selector string.

For instance, we write

const el = document.querySelector("[id='22']");

to call querySelector with "[id='22']" to get the element with ID 22 since valid IDs can’t start with numbers.

Conclusion

To fix Uncaught SyntaxError: Failed to execute ‘querySelector’ on ‘Document’ error with JavaScript, we should make sure we call it with a valid selector string.

By John Au-Yeung

Web developer specializing in React, Vue, and front end development.

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