const searchPopup_search_default = document.getElementById('search-default-content');const searchInput_search_default = document.getElementById('search-default-input'); // 监听实例的弹窗显示状态变化 const observer_search_default = new MutationObserver(() => {// 当弹窗从隐藏变为显示时，执行当前实例的输入框聚焦 if (searchPopup_search_default.style.display !== 'none' && !searchPopup_search_default.hidden) {searchInput_search_default.focus(); // 核心聚焦方法 // 可选：聚焦后选中输入框内内容，方便直接替换（按需开启） // searchInput_.select(); observer_search_default.disconnect(); // 聚焦一次后断开，避免重复触发 }}); // 启动当前实例的监听，仅监听自身弹窗的属性变化，各实例完全独立 observer_search_default.observe(searchPopup_search_default, {attributes: true,attributeFilter: ['style', 'hidden', 'class'] // 仅监听关键属性，性能最优 });

Instrumentation equipment EMC test equipment product list

My company agent sales of domestic and foreign well-known test instrumentation equipment, including electromagnetic compatibility EMC and safety testing industry, equipment brands from all over the world, optional instrument name category covers electronic products to chip integrated circuit testing needs, available to the majority of electronic and electrical measurement laboratories, research institutes, metrology institutes, factories, third-party laboratories, and other departments of the use and procurement of personnel.

You can also choose from the list of EMC test instruments and equipment products below.

YH533388银河
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