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33 lines
1.0 KiB
JavaScript
33 lines
1.0 KiB
JavaScript
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'use strict';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = extractValueFromLogicalExpression;
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/**
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* Extractor function for a LogicalExpression type value node.
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* A logical expression is `a && b` or `a || b`, so we evaluate both sides
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* and return the extracted value of the expression.
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*
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* @param - value - AST Value object with type `LogicalExpression`
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* @returns - The extracted value converted to correct type.
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*/
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function extractValueFromLogicalExpression(value) {
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// eslint-disable-next-line global-require
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var getValue = require('./index.js').default;
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var operator = value.operator,
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left = value.left,
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right = value.right;
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var leftVal = getValue(left);
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var rightVal = getValue(right);
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if (operator === '&&') {
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return leftVal && rightVal;
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}
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if (operator === '??') {
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// return leftVal ?? rightVal; // TODO: update to babel 7
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return leftVal === null || typeof leftVal === 'undefined' ? rightVal : leftVal;
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}
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return leftVal || rightVal;
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}
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