dropposa.blogg.se - Javascript resize image base64

Here is the code to achieve this: index.tsx. It accepts a variety of different image sources, and returns a Promise which resolves to an ImageBitmap. You can resize an image in base64 format using javascript by converting it to an image element, drawing it onto a canvas, resizing the canvas, and then converting the canvas back to a base64 string. The method exists on the global scope in both windows and workers.

Var canvas = document.createElement("canvas") ĭocument.getElementById("original").appendChild(image) ĭocument.getElementById("resampled"). I believe that any resize operation on an image requires an in-memory representation of that image. drawImage (image, x, y, width, height) The first argument image can be created using the Image () constructor, as well as using any existing element. The createImageBitmap () method creates a bitmap from a given source, optionally cropped to contain only a portion of that source.