The HTMLFormElement.length read-only property returns the number of controls in the <form> element. You can access the list of the form's controls using the elements property.

This includes both elements that are descendents of the <form> element as well as elements that are made members of the form using their form property.

The elements which are included by HTMLFormElement.elements and HTMLFormElement.length are:

No other elements are included in the list returned by elements, which makes it an excellent way to get at the elements most important when processing forms.


numControls = form.length;


The number of form controls within the <form>. This is the same as the number of the elements in the HTMLFormControlsCollection returned by the elements property.


if (document.getElementById("form1").length > 1) {
  // more than one form control here


Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support Yes ? Yes ? Yes ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support ? Yes ? Yes Yes ? ?

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Last updated by: connorshea,