canvaslayer v1.0.3
canvaslayer.js
This is an external method of jQuery,combines the functions of jcanvas.canvas adds multiple layers,Support single layer drag, zoom, rotation.Mainly for handheld mobile devices,commonly used in the addition of external multi-images in the canvas, the scaling threshold is between 0.1 and 5.Please be careful to the canvas own requirements and content limits when using.
There must be a jQuery dependency package in the module,or introduce a jQuery file in the html page script.
version: jQuery 1.4 +.In order to achieve good device compatibility, the js startup file can add the
screen-plrequirement module.System Support: Mobile browser kernel Android4.4+ 、ios ；Pc browser kernel webkit、Chrome、Gecko...
Install
npm install canvaslayer --saveUsage
Add the requirement JS library file to the code,Provide three parameters, and is a required argument [obj，imgname，imgsrc].obj is a jQuery canvas object,imgname is the unique name to add the image layer, and is a string type, imgsrc is the source to add the image layer and is a string type. rotation is also supported,default off, open need to add the fourth parameter boolean.
###JavaScript:
let canvaslayer= require('canvaslayer');
let cvs= $('canvas');
canvaslayer(cvs,imgname,imgsrc);###html:
<body>
<canvas width="300" height="150"></canvas>
</body>