Method preloadImageHandler

Pagetual/pagetual.user.js:7144–7160

()

        }

        preloadImageHandler() {
            if (this.preloadingImage || !this.unCheckedImgs.length) return;
            this.preloadingImage = true;
            let src = this.unCheckedImgs.shift(), i = 0, promiseList = [];

            while(src) {
                promiseList.push(this.preloadOneImg(src));
                if (++i > 5) {
                    break;
                } else {
                    src = this.unCheckedImgs.shift();
                }
            }
            Promise.all(promiseList).then(e => {
                this.preloadingImage = false;
            });
        }

        preload() {
            if (!rulesData.preload) return;