84 lines
1.5 KiB
Vue
84 lines
1.5 KiB
Vue
<template>
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<textarea
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ref="textarea"
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:placeholder="placeholder"
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:value="value"
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@input="onInput"
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@focus="onFocus"
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@keyup="onKeyup"
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@blur="onBlur"
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/>
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</template>
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<script>
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const TYPING_INDICATOR_IDLE_TIME = 4000;
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export default {
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props: {
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placeholder: {
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type: String,
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default: '',
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},
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value: {
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type: String,
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default: '',
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},
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minHeight: {
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type: Number,
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default: 2,
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},
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},
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data() {
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return {
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idleTimer: null,
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};
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},
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watch: {
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value() {
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this.resizeTextarea();
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},
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},
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methods: {
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resizeTextarea() {
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if (!this.value) {
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this.$el.style.height = `${this.minHeight}rem`;
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} else {
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this.$el.style.height = `${this.$el.scrollHeight}px`;
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}
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},
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onInput(event) {
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this.$emit('input', event.target.value);
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this.resizeTextarea();
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},
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resetTyping() {
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this.$emit('typing-off');
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this.idleTimer = null;
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},
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turnOffIdleTimer() {
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if (this.idleTimer) {
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clearTimeout(this.idleTimer);
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}
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},
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onKeyup() {
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if (!this.idleTimer) {
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this.$emit('typing-on');
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}
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this.turnOffIdleTimer();
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this.idleTimer = setTimeout(
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() => this.resetTyping(),
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TYPING_INDICATOR_IDLE_TIME
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);
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},
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onBlur() {
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this.turnOffIdleTimer();
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this.resetTyping();
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this.$emit('blur');
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},
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onFocus() {
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this.$emit('focus');
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},
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focus() {
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this.$refs.textarea.focus();
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},
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},
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};
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</script>
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