Angular 9
有问题 jsPDF 的模块(安装的类型 + 包本身)
当做 ng serve 它工作
执行 ng build --prod 时,出现错误
ERROR in src/app/xxx/xxxx.componentomponent.ts:52:27 - error TS2351: This expression is not constructable.
Type 'typeof jsPDF' has no construct signatures.
52 let pdf = new jsPDF('p', 'mm', 'a4');
~~~~~
src/app/xxx/xxxx.component.ts:7:1
7 import * as jsPDF from 'jspdf';
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Type originates at this import. A namespace-style import cannot be called or constructed, and will cause a failure at runtime. Consider using a default import or import require here instead.
tsconfig 文件有 "esModuleInterop": true,{
"compileOnSave": false,
"compilerOptions": {
"baseUrl": "./",
"outDir": "./dist/out-tsc",
"sourceMap": true,
"declaration": false,
"downlevelIteration": true,
"experimentalDecorators": true,
"module": "esnext",
"moduleResolution": "node",
"resolveJsonModule": true,
"esModuleInterop": true,
"importHelpers": true,
"target": "es2015",
"allowSyntheticDefaultImports":true,
"typeRoots": [
"node_modules/@types"
],
"lib": [
"es2018",
"dom"
]
},
"angularCompilerOptions": {
"fullTemplateTypeCheck": true,
"strictInjectionParameters": true
}
}
我像这样导入模块:**import * as jsPDF from 'jspdf';**
在我的类里面像这样使用它: generatePDF() {
var data = document.getElementById('contentToConvert');
html2canvas(data).then(canvas => {
var imgWidth = 208;
var imgHeight = canvas.height * imgWidth / canvas.width;
const contentDataURL = canvas.toDataURL('image/png')
let pdf = **new jsPDF**('p', 'mm', 'a4');
var position = 0;
pdf.addImage(contentDataURL, 'PNG', 0, position, imgWidth, imgHeight)
pdf.save('skill-set.pdf');
});
}
我还尝试在 angular.json 的脚本部分添加模块 js 文件 "scripts": [
"node_modules/jquery/dist/jquery.min.js",
"node_modules/bootstrap/dist/js/bootstrap.min.js",
**"node_modules/jspdf/dist/jspdf.min.js"**
]
最佳答案
(在 Angular 10 中测试,所以我猜这个修复程序适用于较新的 Angular 版本)
而不是这个:
import * as jsPDF from 'jspdf';
写这个:import jspdf from 'jspdf';
[ 小心 !两个jspdf
第 2 行是小写字母 ]那么你的
let pdf = new jsPDF('p', 'mm', 'a4');
也可以,只需将全部更改为小写字母( 在执行此操作之前,您必须像我的第二个导入行一样以小写字母导入 )let pdf = new jspdf('p', 'mm', 'a4');
关于带有 jsPDF 模块 : Type 'typeof jsPDF' has no construct signatures 的 Angular 9,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/62609378/