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Showing content from https://developer.mozilla.org/en-US/docs/Web/API/Element/append below:

Element: append() method - Web APIs

append(param1)
append(param1, param2)
append(param1, param2, /* â¦, */ paramN)

Parameters

param1, â¦, paramN: A set of Node objects or strings to insert.

Return value

None (undefined).

Exceptions

HierarchyRequestError DOMException: Thrown when the node cannot be inserted at the specified point in the hierarchy.

Examples Appending an element

let div = document.createElement("div");
let p = document.createElement("p");
div.append(p);

console.log(div.childNodes); // NodeList [ <p> ]

Appending text

let div = document.createElement("div");
div.append("Some text");

console.log(div.textContent); // "Some text"

Appending an element and text

let div = document.createElement("div");
let p = document.createElement("p");
div.append("Some text", p);

console.log(div.childNodes); // NodeList [ #text "Some text", <p> ]

The append method is unscopable

The append() method is not scoped into the with statement. See Symbol.unscopables for more information.

let div = document.createElement("div");

with (div) {
  append("foo");
}
// ReferenceError: append is not defined

Specifications Browser compatibility

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