在JQ中 carvas.getContext('2d'),报错Uncaught TypeError: canvas.getContext is not a function varcanvas = $('canvas');varcontext = canvas.getContext('2d');//改为varcanvas = $('canvas');varcontext = canvas.get(0).getContext('2d');...
针对你遇到的“.getcontext is not a function”错误,我们可以从以下几个方面进行分析和解答: 确定.getcontext所属的对象或库: .getcontext 并不是一个标准的JavaScript方法,你可能是想使用 .getContext 方法。这个方法属于HTML <canvas> 元素,用于获取该元素的绘图上下文。 检查是否正确导入了该对象或库...
就可以啦 <script type="text/javascript"> var c = document.getElementById("myCanvas");var cxt = c.getContext("2d");cxt.fillStyle="#FF0000";cxt.fillRect(0,0,150,75);//jquery var my=$("#myCanvas");var context=my[0].getContext('2d');context.fillStyle="#FF0000";conte...
document.write(canvas.getContext('2d')); <g class="node" transform="translate(210,330)"> <canvas x="-8" y="-8" id="0_0"></canvas> </g> <canvas x="-8" y="-8" id="0_0"> "canvas" Uncaught TypeError: canvas.getContext is not a function at Array.populateN...
canvas.getContext is not a function Please see the JavaScript I am using: console.log("START"); var canvas = document.getElementById($parameters.Id); console.log(canvas); var ctx = canvas.getContext("2d"); console.log(ctx); ctx.fillStyle = "#FF0000"; ...
and have the canvas on my html. It will view an type error of TypeError: canvas.getContext is not a function The error file signature_pad/dist/signature_pad.m.js:260 > 260 | this._ctx = canvas.getContext('2d'); oniejchanged the titleCannot read property 'getContext' of nullJan 12...
* Uncaught TypeError: this.canvas.getContext is not a function * 说明: * 使用Gauge.js的遇到这个问题,之前梦真使用的时候直接用div就OK的,目前 * 还不知道为什么这里要用canvas来做才行。 * * 2017-3-9 深圳 南山平山村 曾剑锋 ***/一、参考文档:1. 报错 Uncaught TypeError: c.getContextisnot a ...
1回答 傅猿猿 2018-06-10 02:57:40 写的方法不对啊,是getcontext(2d),并且没有大写 0 回复 相似问题this.$emit is not a function 2457 0 9 fileSystem.statSync is not a function 1552 1 4 TypeError: utf-8 is not a function 1280 0 3 疯狂报错Vue.extend is not a function ...
但是这些分析工具背后的本质原理就不见得理解深刻了，而且有的时候面对一系列 backtrace 或者 stack 日志...
问未捕获TypeError: canvas.node(...).getContext不是函数EN和Java一样,python也提供了对于checked ...