如何为 Fabric.js 启用响应式设计 [英] How to enable responsive design for Fabric.js

问题描述

有没有办法使用浏览器调整 Fabric.js 画布的大小以在任何设备上启用相同的结果?我说的是响应式设计.

Is there a way to make a Fabric.js canvas resize with the browser to enable the same result on any device? I'm talking about responsive design.

有人有代码示例吗?

推荐答案

基本上你需要获取设备屏幕的宽度和高度.之后只需在您的 Javascript 中相应地调整画布的大小.示例:

Basically you need to get the device screen's width and height. Afterwards just resize the canvas accordingly in your Javascript. Example:

var width = (window.innerWidth > 0) ? window.innerWidth : screen.width;
var height = (window.innerHeight > 0) ? window.innerHeight : screen.height;
var canvas = document.getElementById("canvas");
canvas.width = width;
canvas.height = height;

不过，您的屏幕可能具有不同的分辨率，在这种情况下，我通常会计算原始宽度和设备的宽度比，然后使用该值相应地调整宽度和高度.示例:

You might have screens with varying resolution ratios though, what I usually do in this case is calculate your original width's and the device's width ratio and then adjust both width and height accordingly with that value. Example:

var originalWidth = 960;  //Example value
var width = (window.innerWidth > 0) ? window.innerWidth : screen.width;
var widthRatio = originalWidth / width;
canvas.width *= widthRatio;
canvas.height *= widthRatio;

这通常对我来说在任何设备上都能正常工作，希望能有所帮助.

This usually works fine for me on any device, hope this helps.

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