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(function(){ let w = window.innerWidth; function setHeaderCssVar() { const headerEle = document.getElementById('shoplaza-section-header'); if(!headerEle){ return }; document.body.style.setProperty('--window-height', `${window.innerHeight}px`); document.body.style.setProperty('--header-height', `${headerEle.clientHeight}px`); const mdScorllHideEle = headerEle.querySelector('.header__mobile .header__scroll_hide'); if (mdScorllHideEle) { document.body.style.setProperty('--header-scroll-hide-height-md', `${mdScorllHideEle.clientHeight}px`); } const pcScorllHideEle = headerEle.querySelector('.header__desktop .header__scroll_hide'); if (pcScorllHideEle) { document.body.style.setProperty('--header-scroll-hide-height-pc', `${pcScorllHideEle.clientHeight}px`); } } function handlResize() { if(w == window.innerWidth){return}; w = window.innerWidth; setHeaderCssVar(); }; function init(){ setHeaderCssVar(); window.removeEventListener('resize', window._theme_header_listener) window._theme_header_listener = handlResize; window.addEventListener('resize', window._theme_header_listener); } init(); })();

How’s the performance of the JJRC C8815?

May 05, 2026 by JJRC Fans

Overall, the performance of the JJRC C8815 is on the weaker side, focusing more on realism and reproduction. If you want stronger off-road performance, you might need to make some upgrades.

For example, upgrading to an outrunner motor provides higher torque, smoother low-speed control, and is better suited for crawling and precise handling.

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const TAG = "spz-custom-announcement"; const DISPLAY_TYPE = { ANNOUNCEMENT: "PTT_BANNER" // 公告栏 }; const API = { LIST: `/api/storefront/promotion/placement/list`, // 获取公告栏列表 REPORT: `/api/storefront/promotion/placement/data/report` // 上报数据 }; const DISPLAY_DEVICE = { PC_AND_MOBILE: "PD_PC_MOBILE", // PC和移动端 PC: "PD_PC", // PC MOBILE: "PD_MOBILE" // 移动端 }; const REPORT_EVENT = { CLICK: "PE_CLICK", // 点击事件 IMPRESSION: "PE_IMPRESSION" // 曝光事件 }; const POSITION = { TOP: "PP_TOP", // 顶部 BOTTOM: "PP_BOTTOM" // 底部 } const MODE = { FIXED: "PM_FIXED", // 固定 NORMAL: "PM_SCROLLING" // 滚动 } const THEME_NAME = window.SHOPLAZZA.theme.merchant_theme_name; class SpzCustomAnnouncement extends SPZ.BaseElement { constructor(element) { super(element); this.announcementList_ = []; // 公告栏数据 } static deferredMount() { return false; } buildCallback() { this.action_ = SPZServices.actionServiceForDoc(this.element); this.templates_ = SPZServices.templatesForDoc(this.element); this.xhr_ = SPZServices.xhrFor(this.win); this.setupAction_(); this.viewport_ = this.getViewport(); } mountCallback() { this.fetchData_(); this.createAnnouncementDom_(); this.listenCartChange_(); } fetchData_(type = '') { const id = window.SHOPLAZZA.meta.page.template_type === 51 ? window.SHOPLAZZA.meta.page.resource_id : 0; return this.xhr_.fetchJson(API.LIST, { method: 'POST', body: { page_id: window.SHOPLAZZA.meta.page.template_type, placement_type: DISPLAY_TYPE.ANNOUNCEMENT, discount_id: id } }).then((res) => { this.announcementList_ = res.list || []; if (this.announcementList_.length > 0) { this.announcementList_.forEach((item) => { item.config = JSON.parse(item.config); }); } if(type === 'cartChange') { this.announcementList_.forEach((item) => { this.updateText_(item); }); } else { this.doRender_(this.announcementList_); } }).catch((error) => { console.error(error); }) } doRender_(data) { return this.templates_ .findAndRenderTemplate(this.element, { list: this.announcementList_ }) .then((el) => { const children = this.element.querySelector('*:not(template)'); children && SPZCore.Dom.removeElement(children); this.element.appendChild(el); }) .then(() => { this.announcementList_.forEach((item) => { this.showAnnouncement_(item); }); }).then(() => { this.handleThemeCompatibility_(); }); } // 更新文案 updateText_(item) { const announcement = document.querySelector(`#announcement-${item.id}`); const announcementText = announcement.querySelectorAll('.announcement_text'); const textArr = item.config.text_discount.replace_texts; const textDom = textArr.map((text) => { return `${text}`; }).join(','); announcementText.forEach((text) => { text.innerHTML = textDom; }); } // 创建公告栏dom createAnnouncementDom_() { const isHero = /Hero/.test(THEME_NAME); const isEva = /Eva/.test(THEME_NAME); const headerEl = document.querySelector('[data-section-type="header"]'); const headerSticky = headerEl && SPZCore.Dom.computedStyle(this.win, headerEl).position === 'sticky'; // 创建滚动的底部公告栏 const announcementBottomContainer = document.createElement('div'); announcementBottomContainer.className = 'announcement__container_bottom bootstrap'; document.body.appendChild(announcementBottomContainer); // 创建固定的底部公告栏 const announcementBottomSticky = document.createElement('ljs-sticky'); announcementBottomSticky.className = 'announcement__container_bottom-sticky'; announcementBottomSticky.setAttribute('layout', 'container'); announcementBottomSticky.setAttribute('position', 'bottom'); announcementBottomSticky.style.position = 'fixed'; announcementBottomSticky.style.bottom = '0'; announcementBottomSticky.style.left = '0'; announcementBottomSticky.style.right = '0'; announcementBottomSticky.style.zIndex = '1030'; document.body.appendChild(announcementBottomSticky); const announcementTopContainer = document.createElement('div'); announcementTopContainer.classList.add('announcement__container_top'); if (isHero) { announcementTopContainer.classList.add('announcement__container_top_zIndex_1030'); } announcementTopContainer.classList.add('bootstrap'); document.body.insertBefore(announcementTopContainer, document.body.children[0]); const announcementTopFixedContainer = document.createElement('div'); announcementTopFixedContainer.classList.add('announcement__container_top-fixed'); if (isHero) { announcementTopFixedContainer.classList.add('announcement__container_top_zIndex_1030'); } announcementTopFixedContainer.classList.add('bootstrap'); const insertBeforeElement = headerSticky ? headerEl : document.body; insertBeforeElement.insertBefore(announcementTopFixedContainer, insertBeforeElement.children[0]); if (isEva) { const evaHeader = document.querySelector('header.header'); const isEvaMaskHeader = evaHeader && SPZCore.Dom.computedStyle(this.win, evaHeader).position === 'absolute'; let fixedBannerTopContainer = document.querySelector('.announcement__container_top-fixed'); if (isEvaMaskHeader) { if (fixedBannerTopContainer) { fixedBannerTopContainer.remove(); } const newBanner = document.createElement('div'); newBanner.className = 'announcement__container_top-fixed bootstrap'; document.body.insertBefore(newBanner, document.body.firstChild); fixedBannerTopContainer = newBanner; } else { if (!headerEl) return; const observer = new MutationObserver(() => { const isSticky = SPZCore.Dom.computedStyle(this.win, headerEl).position === 'sticky'; if (!isSticky) return; const isTopFixedAnnouncementInHeader = headerEl.querySelector('.announcement__container_top-fixed'); if (isTopFixedAnnouncementInHeader) return; const announcementTopFixedContainer = document.querySelector('.announcement__container_top-fixed'); if (announcementTopFixedContainer) { announcementTopFixedContainer.remove(); headerEl.insertBefore(announcementTopFixedContainer, headerEl.children[0]); observer.disconnect(); } }); observer.observe(headerEl, { attributes: true, attributeFilter: ['style', 'class'] }); } if (headerSticky && !isEvaMaskHeader && fixedBannerTopContainer) { fixedBannerTopContainer.style.position = 'relative'; fixedBannerTopContainer.style.zIndex = '29'; } } } // 展示公告栏 showAnnouncement_(item) { const announcement = document.querySelector(`#announcement-${item.id}`); const announcementBottomContainer = document.querySelector('.announcement__container_bottom'); const announcementBottomSticky = document.querySelector('.announcement__container_bottom-sticky'); const announcementTopContainer = document.querySelector('.announcement__container_top'); const announcementTopFixedContainer = document.querySelector('.announcement__container_top-fixed'); const isPC = this.viewport_.getWidth() >= 960; const isMobile = this.viewport_.getWidth() < 960; const isMatchPCDevice = item.device === DISPLAY_DEVICE.PC_AND_MOBILE || item.device === DISPLAY_DEVICE.PC; const isMatchMobileDevice = item.device == DISPLAY_DEVICE.PC_AND_MOBILE || item.device === DISPLAY_DEVICE.MOBILE; if((isPC && isMatchPCDevice) || (isMobile && isMatchMobileDevice)) { if (item.position === POSITION.BOTTOM) { if(item.mode === MODE.FIXED) { announcementBottomSticky && announcementBottomSticky.appendChild(announcement); } else { announcementBottomContainer && announcementBottomContainer.appendChild(announcement); } } else { if (item.mode === MODE.FIXED) { announcementTopFixedContainer && announcementTopFixedContainer.appendChild(announcement); } else { announcementTopContainer && announcementTopContainer.appendChild(announcement); } } this.reportData({ placement_id: item.id, event: REPORT_EVENT.IMPRESSION }); } } // 处理主题兼容 handleThemeCompatibility_() { try { const isBoost = /Boost/.test(THEME_NAME); const isHyde = /Hyde/.test(THEME_NAME); const isEva = /Eva/.test(THEME_NAME); const boostHeader = document.querySelector('.boost-header'); const fixedBannerTopContainer = document.querySelector('.announcement__container_top-fixed'); const notFixedBannerTopContainer = document.querySelector('.announcement__container_top'); const headerEl = document.querySelector('[data-section-type="header"]'); const headerSticky = headerEl && SPZCore.Dom.computedStyle(this.win, headerEl).position === 'sticky'; const header = document.querySelector('.header__fixed') || document.querySelector('.header__wrapper'); const headerFixed = header && SPZCore.Dom.computedStyle(this.win, header).position === 'fixed'; const handleScroll = SPZCore.Types.throttle(this.win, () => { if (isHyde) { if (header && headerSticky) { header.style.marginTop = `${fixedBannerTopContainer.offsetHeight}px`; } else { notFixedBannerTopContainer.style.marginTop = `${fixedBannerTopContainer.offsetHeight}px`; } } if (isEva) { const evaHeader = document.querySelector('header.header'); const isEvaMaskHeader = evaHeader && SPZCore.Dom.computedStyle(this.win, evaHeader).position === 'absolute'; if (!isEvaMaskHeader) return; if (evaHeader.classList.contains('header__fixed')) { evaHeader.style.marginTop = `${fixedBannerTopContainer.offsetHeight}px`; } else { notFixedBannerTopContainer.style.marginTop = `${fixedBannerTopContainer.offsetHeight}px`; } if(document.documentElement.scrollTop === 0) { evaHeader.style.marginTop = '0'; } } if (headerSticky) return; if (headerFixed) { header.style.marginTop = `${fixedBannerTopContainer.offsetHeight}px`; } else { const observer = new MutationObserver((mutationsList, observer) => { for (const mutation of mutationsList) { if (mutation.type === 'childList' && fixedBannerTopContainer.childElementCount > 0) { notFixedBannerTopContainer.style.marginTop = `${fixedBannerTopContainer.offsetHeight}px`; observer.disconnect(); // 停止观察 break; } } }); // 开始观察 fixedBannerTopContainer 的子节点变化 observer.observe(fixedBannerTopContainer, { childList: true, subtree: true }); // 初始检查 if (fixedBannerTopContainer.childElementCount > 0) { notFixedBannerTopContainer.style.marginTop = `${fixedBannerTopContainer.offsetHeight}px`; } if(header) { header.style.marginTop = '0'; } } if (isBoost) { fixedBannerTopContainer.style.zIndex = '1031'; if (boostHeader && boostHeader.classList.contains('header__fixed')) { boostHeader.style.marginTop = `${fixedBannerTopContainer.offsetHeight}px`; } else { notFixedBannerTopContainer.style.marginTop = `${fixedBannerTopContainer.offsetHeight}px`; } } }, 16); window.addEventListener('scroll', handleScroll); window.dispatchEvent(new Event('scroll')); } catch (error) { console.error('error', error); } } // 上报数据 async reportData(data) { // 如果是主题编辑器则不用处理 if(window.top !== window.self) { return; } this.xhr_.fetchJson(API.REPORT, { method: "POST", body: { placement_id: data.placement_id, event: data.event } }); } // 监听购物车变化事件dj.cartChange listenCartChange_() { SPZUtils.Event.listen(document, 'dj.cartChange', (event) => { this.fetchData_('cartChange'); }); } setupAction_() { this.registerAction('handleClose', (invocation) => { const data = invocation.args; const id = data.id; const announcement = document.querySelector(`#announcement-${id}`); announcement && SPZCore.Dom.removeElement(announcement); window.dispatchEvent(new Event('scroll')); }); this.registerAction('handleJumpLink', (invocation) => { const data = invocation.args; if(!data.show_url) return; data.url && window.open(data.url, data.open_new_window ? '_blank' : '_self'); this.reportData({ placement_id: data.id, event: REPORT_EVENT.CLICK }); }); } triggerEvent_(name, data) { const event = SPZUtils.Event.create(this.win, `${ TAG }.${ name }`, data || {}); this.action_.trigger(this.element, name, event); } isLayoutSupported(layout) { return layout == SPZCore.Layout.CONTAINER; } } SPZ.defineElement(TAG, SpzCustomAnnouncement);