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String.prototype.sub()
Deprecated
Avoid using this feature in new projects.
HTML wrapper methods exist only for backwards compatibility. Use DOM APIs to create elements instead.
This feature may be a candidate for removal from web standards or browsers.
Consider using the following features instead:
DOM.
The sub() method of String values creates a string that embeds this string in a <sub> element (<sub>str</sub>), which causes this string to be displayed as subscript.
A string beginning with a <sub> start tag, then the text str, and then a </sub> end tag.
The code below creates an HTML string and then replaces the document's body with it:
js
const contentString = "Hello, world";
document.body.innerHTML = contentString.sub();
This will create the following HTML:
html
<sub>Hello, world</sub>
Instead of using sub() and creating HTML text directly, you should use DOM APIs such as document.createElement(). For example:
js
const contentString = "Hello, world";
const elem = document.createElement("sub");
elem.innerText = contentString;
document.body.appendChild(elem);