43 lines
966 B
JavaScript
43 lines
966 B
JavaScript
// FROM: https://github.com/Matt-Esch/virtual-dom
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// License: MIT
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function AttributeHook(namespace, value) {
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if (!(this instanceof AttributeHook)) {
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return new AttributeHook(namespace, value);
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}
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this.namespace = namespace;
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this.value = value;
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}
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AttributeHook.prototype.hook = function (node, prop, prev) {
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if (
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prev &&
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prev.type === "AttributeHook" &&
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prev.value === this.value &&
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prev.namespace === this.namespace
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) {
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return;
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}
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node.setAttributeNS(this.namespace, prop, this.value);
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};
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AttributeHook.prototype.unhook = function (node, prop, next) {
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if (
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next &&
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next.type === "AttributeHook" &&
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next.namespace === this.namespace
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) {
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return;
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}
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let colonPosition = prop.indexOf(":");
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let localName = colonPosition > -1 ? prop.slice(colonPosition + 1) : prop;
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node.removeAttributeNS(this.namespace, localName);
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};
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AttributeHook.prototype.type = "AttributeHook";
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export default AttributeHook;
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