happy-dom
Version:
Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. It includes many web standards from WHATWG DOM and HTML.
66 lines • 2 kB
JavaScript
/**
* Node utility.
*/
export default class ClassMethodBinder {
target;
classes;
cache = new Map();
/**
* Constructor.
*
* @param target Target.
* @param classes Classes.
*/
constructor(target, classes) {
this.target = target;
this.classes = classes;
}
/**
* Binds method, getters and setters to a target.
*
* @param name Method name.
*/
bind(name) {
// We should never bind the Symbol.iterator method as it can cause problems with Array.from()
if (this.cache.has(name) || name === Symbol.iterator || name === 'constructor') {
return;
}
this.cache.set(name, true);
const target = this.target;
if (!(name in target)) {
return;
}
for (const _class of this.classes) {
const descriptor = Object.getOwnPropertyDescriptor(_class.prototype, name);
if (descriptor) {
if (typeof descriptor.value === 'function') {
if (descriptor.value.toString().startsWith('class ')) {
// Do not bind classes
return;
}
Object.defineProperty(target, name, {
...descriptor,
value: descriptor.value.bind(target)
});
}
else if (descriptor.get !== undefined) {
Object.defineProperty(target, name, {
...descriptor,
get: descriptor.get?.bind(target),
set: descriptor.set?.bind(target)
});
}
return;
}
}
}
/**
* Prevents a method, getter or setter from being bound.
*
* @param name Method name.
*/
preventBinding(name) {
this.cache.set(name, true);
}
}
//# sourceMappingURL=ClassMethodBinder.js.map