Jakob Linskeseder
e534a911f3
Prettier v2 has the following breaking changes: * enforces spaces between `function` and params * enforces trailing commas by default
34 lines
1.2 KiB
JavaScript
34 lines
1.2 KiB
JavaScript
import { Exception } from '@handlebars/parser';
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import { isEmpty, isFunction } from '../utils';
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export default function (instance) {
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instance.registerHelper('if', function (conditional, options) {
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if (arguments.length != 2) {
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throw new Exception('#if requires exactly one argument');
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}
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if (isFunction(conditional)) {
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conditional = conditional.call(this);
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}
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// Default behavior is to render the positive path if the value is truthy and not empty.
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// The `includeZero` option may be set to treat the conditional as purely not empty based on the
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// behavior of isEmpty. Effectively this determines if 0 is handled by the positive path or negative.
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if ((!options.hash.includeZero && !conditional) || isEmpty(conditional)) {
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return options.inverse(this);
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} else {
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return options.fn(this);
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}
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});
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instance.registerHelper('unless', function (conditional, options) {
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if (arguments.length != 2) {
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throw new Exception('#unless requires exactly one argument');
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}
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return instance.helpers['if'].call(this, conditional, {
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fn: options.inverse,
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inverse: options.fn,
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hash: options.hash,
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});
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});
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}
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