How to use js to convert images to base64

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Release: 2018-06-06 11:44:22
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This time I will show you how to use js to convert images to base64, and what are the precautions on how to use js to convert images to base64. The following is a practical case, let's take a look.

Method 1: Blob and FileReader objects

Implementation principle:

Use xhr to request images, and set the returned file type to Blob object [xhr .responseType = "blob"]

Use FileReader object to receive blob

      js 图片转base64方式 

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Method 2: canvas.toDataURL() method

Implementation principle:

Use the canvas.toDataURL() method

Need to solve the cross-domain problem of images image.crossOrigin = '';

Used the $.Deferred() method of the Jquery library

      js 图片转base64方式 

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I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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The above is the detailed content of How to use js to convert images to base64. For more information, please follow other related articles on the PHP Chinese website!

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