convert image url to blob javascript

Why? Users do not need to download images and then upload them through input file; The chrome plug-in can directly right-click the image on the page and upload the image directly; All to increase user experience! Ideas Request an image through

SOURCE http://blog.csdn.net/cuixiping/article/details/45932793Canvas converted to Dataurl (get dataurl from canvas)var dataurl = canvas.toDataURL(‘image/png‘);var dataurl2 = canvas.toDataURL(‘image/jpeg‘, 0.8);Convert file object to Dataurl, Blob

Canvas converted to Dataurl (get dataurl from canvas)var dataurl = canvas.toDataURL(‘image/png‘);Convert file object to Dataurl, Blob object to DataurlThe file object is also a Blob object, with the same processing.function readBlobAsDataURL(blob,

Javascript and dataurlblob that are mutually converted between DataURL and File, Blob, and canvas objectsConvert canvas to dataURL (get dataURL from canvas) var dataurl = canvas.toDataURL('image/png');Convert File objects to dataURL and Blob objects

The upload and preview functions of images are mainly used to preview the effects of images before they are uploaded. Currently, the mainstream methods include js, jquery, and flash, however, we generally use js to implement the Image Upload preview

A. File and blob A Blob object is a class file object that contains read-only raw data. The data in a BLOB object does not necessarily have to be a native form in JavaScript. The file interface is based on a blob, inherits the functionality of the

Implement the Image Upload local preview function based on jquery and jquery Image Upload When we upload a file to the server every time, we can preview the file. It seems reasonable. If the network speed is slow or the image is faulty, this not

Image upload Preview function is mainly used in front of the picture upload a preview of the effect, the current mainstream methods are mainly js,jquery and flash implementation, but we will generally use JS to achieve the image upload preview

It's written in front. This period of time has been a friend to ask the file upload download, search the forum found that a number of related issues, but not enough system, in the spirit of serving the people this article tries to put some problems

JavaScript converts a base64 image to formData and submits it through AJAX. Previously, we used the webcam plug-in to take a photo. After taking the photo, we got an image in base64 format. It's okay to directly display it. Just specify it in src,