Typescript blob文件名没有链接

Question

如何在打字稿中设置blob的文件名？对于IE,我可以轻松设置文件名,但对于Chrome,它看起来不可能.基本上我需要类似于这个解决方案但有打字稿的东西

downloadFile(data: any) {
    var blob = new Blob([data], {type: 'text/csv'});
    let fileName = 'my-test.csv';

    if (window.navigator && window.navigator.msSaveOrOpenBlob) {
        //save file for IE
        window.navigator.msSaveOrOpenBlob(blob, fileName);
    } else {
        //save for other browsers: Chrome, Firefox

        var objectUrl = URL.createObjectURL(blob);
        window.open(objectUrl);
    }
}

从html UI/angular 2调用此函数:

<button type="button" class="btn btn-success"
(click)="downloadFile('test')">Download <br /> Download </button>

Answer 1

对于chrome(和firefox),你需要做一些工作来创建一个<a>元素并调用click:

downloadFile(data: any): void {
    const blob: Blob = new Blob([data], {type: 'text/csv'});
    const fileName: string = 'my-test.csv';
    const objectUrl: string = URL.createObjectURL(blob);
    const a: HTMLAnchorElement = document.createElement('a') as HTMLAnchorElement;

    a.href = objectUrl;
    a.download = fileName;
    document.body.appendChild(a);
    a.click();        

    document.body.removeChild(a);
    URL.revokeObjectURL(objectUrl);
}