摘要：
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document< 阅读全文
摘要：
句柄DOM监听事件 document.getElementById("btn").addEventListener("click", function(){ alert("句柄监听事件"); } ); <!DOCTYPE html> <html lang="en"> <head> <meta cha 阅读全文