import html2canvas from 'html2canvas'
async saveImage(divText, _this) {
let canvasID = _this.$refs[divText];
let a = document.createElement('a');
return new Promise((resolve, reject) => {
html2canvas(canvasID, {
height: 500,
allowTaint: true,
useCORS: true,
}).then(canvas => {
// const base64 = canvas.toDataURL('image/png', 0.5)
// console.log(base64)
// resolve(base64)
let blob = _this.dataURLToBlob(canvas.toDataURL('image/png'));
let file = new window.File([blob], 'dddd.png', { type: blob.type })// 转成File
resolve(file)
}).catch(() => {
reject({})
});
})
},
dataURLToBlob(dataurl) {
var arr = dataurl.split(',')
var mime = arr[0].match(/:(.*?);/)[1]
var bstr = atob(arr[1])
var n = bstr.length
var u8arr = new Uint8Array(n)
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
return new Blob([u8arr], { type: mime });
},