This Boolean attribute indicates that multiple options can be selected in the list. If it is not specified, then only one option can be selected ... ... <看更多>

In today's video we'll be creating a custom multi-select (or single-select) menu using HTML, CSS ... ... <看更多>

placeholder_text_multiple, "Select Some Options", The text to be displayed as a placeholder when no options are selected for a multiple select. ... <看更多>

4 Answers · a "filter" to filter the source items (important for hundreds of source items) · multi select in both lists · buttons + drag & drop ... ... <看更多>