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author | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:40:17 -0500 |
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committer | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:40:17 -0500 |
commit | 33058f2b292b3a581333bdfb21b8f671898c5060 (patch) | |
tree | 51c3e392513ec574331b2d3f85c394445ea803c6 /files/zh-cn/web/api/file/getastext | |
parent | 8b66d724f7caf0157093fb09cfec8fbd0c6ad50a (diff) | |
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Diffstat (limited to 'files/zh-cn/web/api/file/getastext')
-rw-r--r-- | files/zh-cn/web/api/file/getastext/index.html | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/files/zh-cn/web/api/file/getastext/index.html b/files/zh-cn/web/api/file/getastext/index.html new file mode 100644 index 0000000000..a71b8f254e --- /dev/null +++ b/files/zh-cn/web/api/file/getastext/index.html @@ -0,0 +1,45 @@ +--- +title: File.getAsText +slug: Web/API/File/getAsText +translation_of: Web/API/File/getAsText +--- +<p>{{APIRef("File API")}}</p> + +<h3 id="概述">概述</h3> + +<p>按照指定的编码类型将文件内容解析成字符串并返回.</p> + +<h3 id="示例">示例</h3> + +<pre class="eval">// fileInput是一个HTMLInputElement元素: <input type="file" id="myfileinput" multiple> +var fileInput = document.getElementById("myfileinput"); + +// files是一个FileList对象(类似NodeList) +var files = fileInput.files; + +// 一个对象,包含了允许的MIME类型 +var accept = { + binary : ["image/png", "image/jpeg"], + text : ["text/plain", "text/css", "application/xml", "text/html"] +}; + +var file; + +for (var i = 0; i < files.length; i++) { + + file = files[i]; + + // 如果文件的类型能够被检测到 + if (file !== null) { + + if (accept.text.indexOf(file.mediaType) > -1) { + + // file是个可接受的文本文件,使用utf-8编码读取 + var data = file.getAsText("utf-8"); + // 使用字符串方法处理data + + } else if (accept.binary.indexOf(file.mediaType) > -1) { + // file是个可接受的二进制文件 + } + } +}</pre> |