Web Reference: Feb 10, 2026 · For example, imagine a product list where users need to delete multiple items: instead of clicking each checkbox individually, a "Select All" option streamlines the process. In this guide, we’ll walk through creating a fully functional "Select All" checkbox from scratch. I have an HTML page with multiple checkboxes. I need one more checkbox by the name "select all". When I select this checkbox all checkboxes in the HTML page must be selected. How can I do this? Notice how all the checkboxes so far have not been checked from the beginning - the user would have to interact with the checkbox to change its state from unchecked to checked. This might be what you want, but sometimes, you want the checkbox to be checked by default, either to suggest a choice to the user or because you are showing a checkbox with...
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