String.prototype.sup()
Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
String 值的 sup() 方法创建一个字符串，将该字符串嵌入到 <sup> 元素 (<sup>str</sup>) 中，这会导致该字符串显示为上标。
¥The sup() method of String values creates a string that embeds this string in a <sup> element (<sup>str</sup>), which causes this string to be displayed as superscript.
注意：所有 HTML 封装方法 均已弃用，仅出于兼容性目的而进行标准化。使用 DOM API 例如
document.createElement()代替。¥Note: All HTML wrapper methods are deprecated and only standardized for compatibility purposes. Use DOM APIs such as
document.createElement()instead.
语法
参数
返回值
示例
使用 sup()
¥Using sup()
下面的代码创建一个 HTML 字符串，然后用它替换文档的正文：
¥The code below creates an HTML string and then replaces the document's body with it:
const contentString = "Hello, world";
document.body.innerHTML = contentString.sup();
这将创建以下 HTML：
¥This will create the following HTML:
<sup>Hello, world</sup>
你应该使用 DOM API（例如 document.createElement()），而不是使用 sup() 并直接创建 HTML 文本。例如：
¥Instead of using sup() and creating HTML text directly, you should use DOM APIs such as document.createElement(). For example:
const contentString = "Hello, world";
const elem = document.createElement("sup");
elem.innerText = contentString;
document.body.appendChild(elem);
规范
| Specification |
|---|
| ECMAScript Language Specification # sec-string.prototype.sup |
浏览器兼容性
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