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EsLint Plugin Lit A11y: no-invalid-change-handler (DEPRECATED)

This rule is based on reports of behavior of old browsers (e.g. IE 10 and below). In the meantime, this behavior has been corrected, both in newer versions of browsers as well as in the DOM spec.

Enforce usage of @blur over/in parallel with @change on select menu elements for accessibility. @blur should be used instead of @change, unless absolutely necessary and it causes no negative consequences for keyboard only or screen reader users. @blur is a more declarative action by the user: for instance in a dropdown, using the arrow keys to toggle between options will trigger the @change event in some browsers. Regardless, when a change of context results from an @blur event or an @change event, the user should be notified of the change unless it occurs below the currently focused element.

Rule Details

This rule aims to prevent accessibility problems with <select> and <option> controls.

Examples of incorrect code for this rule:

html` <select @change=${foo}></select> `;
html` <option @change=${foo}></option> `;

Examples of correct code for this rule:

html` <select @blur=${foo}></select> `;
  <select @change="${foo}" @blur="${foo}"></div>

When Not To Use It

If you do not target IE 10 or below, do not use <select> controls in your lit-html templates, or you are certain that your usage of change conforms to WCAG 2.1

Further Reading