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Uncaught (in promise) DOMException: Failed to execute 'add' on 'DOMTokenList': The token provided ('alert alert-danger') contains HTML space characters, which are not valid in tokens.

Shadow answered on August 16, 2021 Popularity 2/10 Helpfulness 1/10

answer Uncaught (in promise) DOMException: Failed to execute 'add' on 'DOMTokenList': The token provided ('alert alert-danger') contains HTML space characters, which are not valid in tokens.

Uncaught (in promise) DOMException: Failed to execute 'add' on 'DOMTokenList': The token provided ('alert alert-danger') contains HTML space characters, which are not valid in tokens.

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//Well, class names cannot contain spaces, because the space separates multiple class names from each other. For example, if your HTML contains

class="zocial button"
//it means that this element has two classes, "zocial" and "button".
//If you want to add both of these classes, you have to pass each one as argument to the method:

buttonz[i].classList.add('zocial', 'button');

Popularity 2/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: contains execute html javascript space

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Contributed on Aug 16 2021

Shadow

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Uncaught (in promise) DOMException: Failed to execute 'add' on 'DOMTokenList': The token provided ('alert alert-danger') contains HTML space characters, which are not valid in tokens.

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Uncaught (in promise) DOMException: Failed to execute 'add' on 'DOMTokenList': The token provided ('alert alert-danger') contains HTML space characters, which are not valid in tokens.

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