@benev/slate/x/tools/shockdrop/utils/dragleave_has_exited_current_target.js

frontend web stuff

export function dragleave_has_exited_current_target(event) {
    const mouse_is_outside_viewport = !event.relatedTarget || (event.clientX === 0 &&
        event.clientY === 0);
    if (mouse_is_outside_viewport)
        return true;
    const rect = event.currentTarget.getBoundingClientRect();
    const withinX = event.clientX >= rect.left && event.clientX <= rect.right;
    const withinY = event.clientY >= rect.top && event.clientY <= rect.bottom;
    const mouse_is_outside_current_target = !(withinX && withinY);
    return mouse_is_outside_current_target;
}
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