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i am not good at english,but i have a question about use jszip. the code like this

 for (var i = 0; i < files.length; i++) {
                    compressFiles(files[i], compressName);
                }

    function compressFiles(file,compressName) {
        var fileContent = file.file;
        var fileName = file.name;
        var zip = new JSZip();
        zip.file(fileName, fileContent);
        zip.generateAsync({ type: "blob" }).then(function (content) {
            saveAs(content, compressName);
        });
    }

my question is when my file in files are very big ,about 88m. some file compress are about 0m i guess the reason is async,the loop put file stream into memory one by one,if the memory is full,compress filed. so who can tell me the real reason?thank you!

tongdengda
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1 Answers1

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You can use an array to keep the zip.file calls and jQuery.when to wait for all of them to finish, and then call zip.generateAsync. Sample code below.

Helpful links:
jQuery.when
What does $.when.apply($, someArray) do?

function zipFiles(images) {
    var zip = new JSZip();
    deferreds = [];
    images.forEach(function(image) {
        deferreds.push(zip.file(image.name, image.data, { binary: true }));
    });
    $.when.apply($, deferreds).then(function() {
        zip.generateAsync({ type: "blob" }).then(function(content) {
            saveAs(content, 'Filename.zip'); //FileSaver.js
        });
    });
}
azharx17
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