46 lines
1.3 KiB
JavaScript
46 lines
1.3 KiB
JavaScript
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const hide = el => el.classList.add('d-none');
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const show = el => el.classList.remove('d-none');
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const setupCollapsibleInput = el => {
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const collapsedEl = el.querySelector('.js-collapsed');
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const expandedEl = el.querySelector('.js-expanded');
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const collapsedInputEl = collapsedEl.querySelector('textarea,input,select');
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const expandedInputEl = expandedEl.querySelector('textarea,input,select');
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const formEl = el.closest('form');
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const collapse = () => {
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hide(expandedEl);
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show(collapsedEl);
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};
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const expand = () => {
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hide(collapsedEl);
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show(expandedEl);
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};
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// NOTE:
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// We add focus listener to all form inputs so that we can collapse
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// when something is focused that's not the expanded input.
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formEl.addEventListener('focusin', e => {
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if (e.target === collapsedInputEl) {
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expand();
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expandedInputEl.focus();
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} else if (!el.contains(e.target) && !expandedInputEl.value) {
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collapse();
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}
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});
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};
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/**
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* Usage in HAML
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*
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* .js-collapsible-input
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* .js-collapsed{ class: ('d-none' if is_expanded) }
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* = input
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* .js-expanded{ class: ('d-none' if !is_expanded) }
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* = big_input
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*/
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export default () => {
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Array.from(document.querySelectorAll('.js-collapsible-input')).forEach(setupCollapsibleInput);
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};
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