用JS实现excel预览
这次为大家分享的是，如何用js写出excel文件的预览。
他方便了pc用户和手机端用户可以无需下载，并且直接在线预览excel文件。
因为excel转html的显示用的是第三方开源库的代码，所以实现上有所限制。具体请参见 所用到开源的库 这些库的说明。
| 支持 | 不支持 |
|---|---|
| 多sheet显示 | 图片显示 |
| 合并后的单元格显示 | 链接，文字样式等 |
| 手机画面优化 |
效果图
PC：
手机：
示例代码
所用到开源的库
js:
jQuery：https://js.cybozu.cn/jquery/3.4.1/jquery.min.js
sheetjs ( js-xlsx )：GitHub - SheetJS/sheetjs: SheetJS Community Edition -- Spreadsheet Data Toolkit
bootstrap： GitHub - twbs/bootstrap: The most popular HTML, CSS, and JavaScript framework for developing responsive, mobile first projects on the web.
css:
GitHub - FortAwesome/Font-Awesome: The iconic SVG, font, and CSS toolkit
GitHub - keaukraine/bootstrap4-fs-modal: A simple way to improve UX of Bootstrap 4 modals on mobile phones. （mobile端）
代码
判断是否为excel文件
|
1
2
3
4
|
function checkXls(file) {
let reg = /\.xl(s[xmb]|t[xm]|am|s)$/g;
return reg.test(file);
}
|
加载模态框，显示加载画面，添加预览图标
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
function loadModal(fileInfo) {
let previewElement;
jQuery( ".file-image-container-gaia" ).each( function (i, e) {
let fileName = jQuery(e).children( "a:eq(0)" ).text();
if (fileName == fileInfo.name && jQuery(e).children( "button" ).length == 0) {
previewElement = jQuery(e);
return false ;
}
});
if (!previewElement) return ;
let modalId = 'myModal' + fileInfo.fileKey;
let tabId = 'myTab' + fileInfo.fileKey;
let tabContentId = 'tab-content' + fileInfo.fileKey;
let $button = $( ' let myModal =
' +
' ' +
' +
' +
' + fileInfo.name + '' +
' +
' +
'' +
'+
' '' +
' ' +
' +
' +
'+
'+
'+
' +
' +
'+
'+
'+
';
previewElement.append($button);
$( 'body' ).prepend(myModal);
$( '#' + modalId).on( 'shown.bs.modal' , function (e) {
loadRemoteFile(fileInfo);
})
}
|
下载文件并加载到模态框中
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
function readWorkbookFromRemoteFile(url, callback) {
let xhr = new XMLHttpRequest();
xhr.open( 'get' , url, true );
xhr.setRequestHeader( 'X-Requested-With' , 'XMLHttpRequest' );
xhr.responseType = 'arraybuffer' ;
xhr.onload = function (e) {
if (xhr.status == 200) {
let data = new Uint8Array(xhr.response)
let workbook = XLSX.read(data, { type: 'array' });
if (callback) callback(workbook);
}
};
xhr.send();
}
function readWorkbook(workbook, fileInfo) {
let sheetNames = workbook.SheetNames;
let navHtml = '' ;
let tabHtml = '' ;
let myTabId = 'myTab' + fileInfo.fileKey;
let tabContentId = 'tab-content' + fileInfo.fileKey;
for (let index = 0; index < sheetNames.length; index++) {
let sheetName = sheetNames[index];
let worksheet = workbook.Sheets[sheetName];
let sheetHtml = XLSX.utils.sheet_to_html(worksheet);
let tabid = "tab" + fileInfo.fileKey + "-" + index;
let xlsid = "xlsid" + fileInfo.fileKey + "-" + index;
let active = index == 0 ? "active" : '' ;
navHtml += ' tabHtml += ' ';
}
jQuery( "#" + myTabId).html(navHtml);
jQuery( "#" + tabContentId).html(tabHtml);
jQuery( "#" + tabContentId + ' table' ).addClass( "table table-bordered table-hover" );
}
function loadRemoteFile(fileInfo) {
let fileUrl = '/k/v1/file.json?fileKey=' + fileInfo.fileKey;
readWorkbookFromRemoteFile(fileUrl, function (workbook) {
readWorkbook(workbook, fileInfo);
});
}
|
具体的mobile优化等等详细代码请参考完整文章：
kintone excel预览插件
更多文章和演示：Kintone demo环境