25 lines
569 B
JavaScript
25 lines
569 B
JavaScript
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'use strict';
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exports.__esModule = true;
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exports.default = function visit(node, keys, visitorSpec) {
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if (!node || !keys) {
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return;
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}
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const type = node.type;
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if (typeof visitorSpec[type] === 'function') {
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visitorSpec[type](node);
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}
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const childFields = keys[type];
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if (!childFields) {
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return;
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}
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childFields.forEach((fieldName) => {
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[].concat(node[fieldName]).forEach((item) => {
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visit(item, keys, visitorSpec);
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});
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});
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if (typeof visitorSpec[`${type}:Exit`] === 'function') {
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visitorSpec[`${type}:Exit`](node);
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}
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};
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