31 lines
958 B
JavaScript
31 lines
958 B
JavaScript
function enhance_textareas() {
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const textareas = document.body.querySelectorAll("textarea:not([data-enhanced])");
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for (const textarea of textareas) {
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const max_length_attr = textarea.getAttribute("maxlength");
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if (/^\d+$/.test(max_length_attr)) {
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const max_length = parseInt(max_length_attr, 10);
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function on_updated() {
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const counters = this.parentElement.querySelectorAll(
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`[data-limit-counter-for="${this.name}"]`,
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);
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for (const counter of counters) {
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counter.innerHTML = `${this.value.length} / ${max_length}`;
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}
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}
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textarea.addEventListener("keyup", on_updated);
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textarea.addEventListener("paste", on_updated);
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textarea.addEventListener("blur", on_updated);
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on_updated.call(textarea);
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}
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textarea.dataset.enhanced = true;
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}
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}
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const textarea_enhancement_observer = new MutationObserver(enhance_textareas);
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textarea_enhancement_observer.observe(document, {
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childList: true,
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subtree: true,
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});
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