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52 lines
1.5 KiB
52 lines
1.5 KiB
5 years ago
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const isFunction = val => typeof val === 'function';
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const onRE = /^on[^a-z]/;
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const isOn = key => onRE.test(key);
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const cacheStringFunction = fn => {
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const cache = Object.create(null);
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return str => {
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const hit = cache[str];
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return hit || (cache[str] = fn(str));
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};
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};
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const camelizeRE = /-(\w)/g;
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const camelize = cacheStringFunction(str => {
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return str.replace(camelizeRE, (_, c) => (c ? c.toUpperCase() : ''));
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});
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const hyphenateRE = /\B([A-Z])/g;
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const hyphenate = cacheStringFunction(str => {
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return str.replace(hyphenateRE, '-$1').toLowerCase();
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});
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const capitalize = cacheStringFunction(str => {
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return str.charAt(0).toUpperCase() + str.slice(1);
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});
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const hasOwnProperty = Object.prototype.hasOwnProperty;
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const hasOwn = (val, key) => hasOwnProperty.call(val, key);
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// change from vue sourcecode
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function resolvePropValue(options, props, key, value, hyphenateKey) {
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const opt = options[key];
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if (opt != null) {
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const hasDefault = hasOwn(opt, 'default');
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// default values
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if (hasDefault && value === undefined) {
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const defaultValue = opt.default;
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value = opt.type !== Function && isFunction(defaultValue) ? defaultValue() : defaultValue;
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}
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// boolean casting
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if (opt[0 /* shouldCast */]) {
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if (!hasOwn(props, hyphenateKey) && !hasDefault) {
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value = false;
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} else if (opt[1 /* shouldCastTrue */] && (value === '' || value === hyphenateKey)) {
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value = true;
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}
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}
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}
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return value;
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}
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export { isOn, cacheStringFunction, camelize, hyphenate, capitalize, resolvePropValue };
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