30 lines
1.1 KiB
JavaScript
30 lines
1.1 KiB
JavaScript
// Supports determination of isControlled().
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// Controlled input accepts its current value as a prop.
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//
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// @see https://facebook.github.io/react/docs/forms.html#controlled-components
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// @param value
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// @returns {boolean} true if string (including '') or number (including zero)
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export function hasValue(value) {
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return value != null && !(Array.isArray(value) && value.length === 0);
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}
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// Determine if field is empty or filled.
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// Response determines if label is presented above field or as placeholder.
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//
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// @param obj
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// @param SSR
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// @returns {boolean} False when not present or empty string.
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// True when any number or string with length.
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export function isFilled(obj, SSR = false) {
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return obj && (hasValue(obj.value) && obj.value !== '' || SSR && hasValue(obj.defaultValue) && obj.defaultValue !== '');
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}
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// Determine if an Input is adorned on start.
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// It's corresponding to the left with LTR.
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//
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// @param obj
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// @returns {boolean} False when no adornments.
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// True when adorned at the start.
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export function isAdornedStart(obj) {
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return obj.startAdornment;
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} |