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Sebastian Markbåge
39 lines
1.1 KiB
JavaScript
39 lines
1.1 KiB
JavaScript
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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export const HTML_NAMESPACE = 'http://www.w3.org/1999/xhtml';
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export const MATH_NAMESPACE = 'http://www.w3.org/1998/Math/MathML';
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export const SVG_NAMESPACE = 'http://www.w3.org/2000/svg';
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// Assumes there is no parent namespace.
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export function getIntrinsicNamespace(type: string): string {
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switch (type) {
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case 'svg':
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return SVG_NAMESPACE;
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case 'math':
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return MATH_NAMESPACE;
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default:
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return HTML_NAMESPACE;
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}
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}
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export function getChildNamespace(
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parentNamespace: string | null,
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type: string,
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): string {
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if (parentNamespace == null || parentNamespace === HTML_NAMESPACE) {
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// No (or default) parent namespace: potential entry point.
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return getIntrinsicNamespace(type);
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}
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if (parentNamespace === SVG_NAMESPACE && type === 'foreignObject') {
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// We're leaving SVG.
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return HTML_NAMESPACE;
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}
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// By default, pass namespace below.
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return parentNamespace;
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}
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