js-xlsx读取xlsx文件的异步详解

这次给大家带来js-xlsx读取xlsx文件的异步详解，使用js-xlsx读取xlsx文件异步操作的注意事项有哪些，下面就是实战案例，一起来看一下。

请求主要函数:

function fetchAB(url, cb) {            var xhr = new XMLHttpRequest;
            xhr.open('get', url, true);
            xhr.responseType = 'arraybuffer';
            xhr.onload = cb;
            xhr.send();
        };

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结合js-xlsx读取xlsx文件在线示例:

<!DOCTYPE html><html><head>
    <meta charset="UTF-8">
    <title></title>
    <script src="http://oss.sheetjs.com/js-xlsx/xlsx.full.min.js"></script>
    <script>
        function fetchAB(url, cb) {            var xhr = new XMLHttpRequest;
            xhr.open('get', url, true);
            xhr.responseType = 'arraybuffer';
            xhr.onload = cb;
            xhr.send();
        };    </script>
    <script>
        var wb;        var url = ""
        function importf() {//导入
            url = document.getElementById("url").value;            if (url) {
                fetchAB(url, function () {                    if (this.status == 200) {
                        wb = XLSX.read(btoa(fixdata(this.response)), {//手动转化
                            type: 'base64'
                        });                        document.getElementById("demo").innerHTML = JSON.stringify(XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[0]]));
                    }
                });
            }
        }        function fixdata(data) { 
            var o = "",
                l = 0,
                w = 10240;            for (; l < data.byteLength / w; ++l) o += String.fromCharCode.apply(null, new Uint8Array(data.slice(l * w, l * w + w)));
            o += String.fromCharCode.apply(null, new Uint8Array(data.slice(l * w)));            return o;
        }    </script></head><body>
    <input type="text" id="url" />
    <input type="button" onclick="importf()" value="读取" />
    <div id="demo"></div></body></html>

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