@antv/x6/es/util/object/inherit.js

JavaScript diagramming library that uses SVG and HTML for rendering.

const extendStatics = Object.setPrototypeOf ||
    ({ __proto__: [] } instanceof Array &&
        function (d, b) {
            d.__proto__ = b;
        }) ||
    function (d, b) {
        for (const p in b) {
            if (b.hasOwnProperty(p)) {
                d[p] = b[p];
            }
        }
    };
/**
 * @see https://github.com/microsoft/TypeScript/blob/5c85febb0ce9d6088cbe9b09cb42f73f9ee8ea05/src/compiler/transformers/es2015.ts#L4309
 */
export function inherit(cls, base) {
    extendStatics(cls, base);
    function tmp() {
        this.constructor = cls;
    }
    cls.prototype =
        base === null
            ? Object.create(base)
            : ((tmp.prototype = base.prototype), new tmp());
}
class A {
}
const isNativeClass = /^\s*class\s+/.test(`${A}`) || /^\s*class\s*\{/.test(`${class {
}}`);
/**
 * Extends class with specified class name.
 */
export function createClass(className, base) {
    // tslint:disable-next-line
    const cls = new Function('base', `
      return ${isNativeClass}
        ? class ${className} extends base { }
        : function ${className}() { return base.apply(this, arguments) }
    `)(base);
    if (!isNativeClass) {
        inherit(cls, base);
    }
    return cls;
}
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