36 lines
715 B
TypeScript
36 lines
715 B
TypeScript
let x: string | number | boolean;
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let cond: boolean;
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(x = "") || (x = 0);
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x; // string | number
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x = "";
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cond || (x = 0);
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x; // string | number
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export interface NodeList {
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length: number;
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}
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export interface HTMLCollection {
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length: number;
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}
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declare function isNodeList(sourceObj: any): sourceObj is NodeList;
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declare function isHTMLCollection(sourceObj: any): sourceObj is HTMLCollection;
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type EventTargetLike = {a: string} | HTMLCollection | NodeList;
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var sourceObj: EventTargetLike = <any>undefined;
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if (isNodeList(sourceObj)) {
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sourceObj.length;
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}
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if (isHTMLCollection(sourceObj)) {
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sourceObj.length;
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}
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if (isNodeList(sourceObj) || isHTMLCollection(sourceObj)) {
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sourceObj.length;
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}
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