pinafore/routes/_components/compose/ComposeLengthIndicator.html

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<span class="compose-box-length {{overLimit ? 'over-char-limit' : ''}}"
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aria-label="{{lengthLabel}}">
{{lengthToDisplayDeferred || '0'}}
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</span>
<style>
.compose-box-length {
grid-area: length;
justify-self: right;
color: var(--main-theme-color);
font-size: 1.3em;
align-self: center;
}
.compose-box-length.over-char-limit {
color: var(--warning-color);
}
</style>
<script>
import { CHAR_LIMIT } from '../../_static/statuses'
import { mark, stop } from '../../_utils/marks'
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import { store } from '../../_store/store'
import { scheduleIdleTask } from '../../_utils/scheduleIdleTask'
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export default {
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oncreate () {
let { lengthToDisplay } = this.get()
this.set({lengthToDisplayDeferred: lengthToDisplay})
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// perf improvement for keyboard input latency
this.observe('lengthToDisplay', () => {
scheduleIdleTask(() => {
mark('set lengthToDisplayDeferred')
let { lengthToDisplay } = this.get() || {} // https://github.com/sveltejs/svelte/issues/1354
this.set({lengthToDisplayDeferred: lengthToDisplay})
stop('set lengthToDisplayDeferred')
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})
}, {init: false})
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},
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store: () => store,
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computed: {
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lengthToDisplay: (length) => CHAR_LIMIT - length,
lengthLabel: (overLimit, lengthToDisplayDeferred) => {
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if (overLimit) {
return `${lengthToDisplayDeferred} characters over limit`
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} else {
return `${lengthToDisplayDeferred} characters remaining`
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}
}
}
}
</script>