document.all is a read-only property that returns an HTMLAllCollection of every element in the document, in document order (MDN).
Read the notes below before you get or set this property. Prefer feature detection when support is limited.
Use document.all. Start with this line.
document.all| Call | What it does |
|---|---|
document.all | Primary signature. |
Built into the browser. Read or assign document.all — no import required.
document.all| Parameter | Description |
|---|---|
| Writable? | Optional. Read-only |
| Return Value | Description |
|---|---|
| * | HTMLAllCollection |
all.lengthRead the size of the legacy collection.
console.log(document.all.length);
console.log(document.all[0].tagName);document.all. Returns an HTMLAllCollection (MDN)..length. Number of elements in the document.[0]. First element in document order (often HTML).querySelectorAll("*").length for new code.typeof QuirkMDN: document.all pretends to be undefined in some checks.
console.log(typeof document.all); // "undefined"
console.log(!!document.all); // false
console.log(document.all == null); // true
console.log(document.all === undefined); // false
console.log(document.all.length > 0); // truetypeof. Returns "undefined" for old if (document.all) IE detection (MDN).== null is true; === undefined is false..length and indexing work as an object.querySelectorAll("*")MDN’s recommended replacement for listing every element.
const allElements = document.querySelectorAll("*");
console.log(allElements.length);
console.log(allElements[0].tagName);
console.log(allElements.constructor.name); // "NodeList""*" matches every element (MDN).NodeList. Modern, iterable, no typeof quirks.document.all.Document.all returns a deprecated HTMLAllCollection. MDN marks it Deprecated. Still present for compatibility, with special typeof behavior.
Available in major browsers for legacy pages. New code should use querySelectorAll("*") or getElementById.
Bottom line: Learn it to read old scripts. See the MDN Document.all reference and migrate to querySelectorAll.
Learn the legacy document.anchors collection of named anchors.
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