html2canvas截取专题图(包含地图)
html2canvas截取专题图(包含地图)
问题:html2canvas截取地图时地图空白,报错: Unable to clone WebGL context as it has preserveDrawingBuffer=false
一、情况介绍:
使用如下代码进行截图时,出现地图空白情况,报错: Unable to clone WebGL context as it has preserveDrawingBuffer=false ,地图使用的框架为mapbox
const exportSave = async () => {
const element = document.getElementById('mapCanvasId');
const options = { scale: 2, backgroundColor: null, }
html2canvas(element, options).then((canvas) => {
const png = canvas.toDataURL("image/png"); // 拿到截图后转换为png图片
// 下载
down(png, '我的制图')
});
}
const down = function (url, name) {
// 创建a标签
const vectorDom = document.createElement('a')
vectorDom.href = url
vectorDom.download = name ? name : url.split(/[//]/).pop()
// console.log(name)
// 不显示a标签
vectorDom.setAttribute('display', 'none')
document.body.appendChild(vectorDom)
vectorDom.click()
setTimeout(() => {
document.body.removeChild(vectorDom)
}, 500)
}
二、解决办法:
在地图初始化时添加添加如下代码:
preserveDrawingBuffer: true
结果效果如下: