19 lines
657 B
TypeScript
19 lines
657 B
TypeScript
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const QUESTION_TEXTAREA_LINE_HEIGHT = 20;
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const QUESTION_TEXTAREA_MIN_LINES = 2;
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const QUESTION_TEXTAREA_MAX_LINES = 10;
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export const QUESTION_CUSTOM_TEXTAREA_MIN_HEIGHT = QUESTION_TEXTAREA_LINE_HEIGHT * QUESTION_TEXTAREA_MIN_LINES;
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export function getQuestionCustomTextareaHeight({
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scrollHeight,
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currentHeight,
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}: {
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scrollHeight: number;
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currentHeight: number | null | undefined;
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}): number | null {
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const maxHeight = QUESTION_TEXTAREA_LINE_HEIGHT * QUESTION_TEXTAREA_MAX_LINES;
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const nextHeight = Math.min(Math.max(scrollHeight, QUESTION_CUSTOM_TEXTAREA_MIN_HEIGHT), maxHeight);
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return currentHeight === nextHeight ? null : nextHeight;
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}
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