ngx-echarts
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42 lines • 4.75 kB
JavaScript
import { of, EMPTY } from 'rxjs';
export class ChangeFilter {
constructor(changes) {
this.changes = changes;
}
static of(changes) {
return new ChangeFilter(changes);
}
notEmpty(key) {
if (this.changes[key]) {
const value = this.changes[key].currentValue;
if (value !== undefined && value !== null) {
return of(value);
}
}
return EMPTY;
}
has(key) {
if (this.changes[key]) {
const value = this.changes[key].currentValue;
return of(value);
}
return EMPTY;
}
notFirst(key) {
if (this.changes[key] && !this.changes[key].isFirstChange()) {
const value = this.changes[key].currentValue;
return of(value);
}
return EMPTY;
}
notFirstAndEmpty(key) {
if (this.changes[key] && !this.changes[key].isFirstChange()) {
const value = this.changes[key].currentValue;
if (value !== undefined && value !== null) {
return of(value);
}
}
return EMPTY;
}
}
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