本文实例为大家分享了JS实现京东快递单号查询的具体代码,供大家参考,具体内容如下
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<!DOCTYPE html> < html lang = "en" > < head > < meta charset = "UTF-8" > < meta name = "viewport" content = "width=device-width, initial-scale=1.0" > < meta http-equiv = "X-UA-Compatible" content = "ie=edge" > < title >Document</ title > < style > * { margin: 0; padding: 0; } .search { position: relative; width: 178px; margin: 100px; } .con { display: none; position: absolute; top: -40px; width: 171px; border: 1px solid rgba(0, 0, 0, .2); box-shadow: 0 2px 4px rgba(0, 0, 0, .2); padding: 5px 0; font-size: 18px; line-height: 20px; color: #333; } .con::before { content: ''; width: 0; height: 0; position: absolute; top: 28px; left: 18px; border: 8px solid #000; border-style: solid dashed dashed; border-color: #fff transparent transparent; } </ style > </ head > < body > < div class = "search" > < div class = "con" >123</ div > < input type = "text" placeholder = "请输入您的快递单号" class = "jd" > </ div > < script > // 快递单号输入内容时, 上面的大号字体盒子(con)显示(这里面的字号更大) // 表单检测用户输入: 给表单添加键盘事件 // 同时把快递单号里面的值(value)获取过来赋值给 con盒子(innerText)做为内容 // 如果快递单号里面内容为空,则隐藏大号字体盒子(con)盒子 var con = document.querySelector('.con'); var jd_input = document.querySelector('.jd'); jd_input.addEventListener('keyup', function() { // console.log('输入内容啦'); if (this.value == '') { con.style.display = 'none'; } else { con.style.display = 'block'; con.innerText = this.value; } }) // 当我们失去焦点,就隐藏这个con盒子 jd_input.addEventListener('blur', function() { con.style.display = 'none'; }) // 当我们获得焦点,就显示这个con盒子 jd_input.addEventListener('focus', function() { if (this.value !== '') { con.style.display = 'block'; } }) </ script > </ body > |
小编再为大家分享一段JS代码:
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<script> var inp = document.querySelector( '.inp' ) var son = document.querySelector( '.son' ) inp.addEventListener( 'keyup' , function () { if ( this .value === '' ) { son.style.visibility = 'hidden' } else { son.style.visibility = 'visible' son.innerHTML = this .value } }) inp.addEventListener( 'blur' , function () { son.style.visibility = 'hidden' }) inp.addEventListener( 'focus' , function () { if ( this .value !== '' ) { son.style.visibility = 'visible' } }) </script> |
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/qq_44954571/article/details/107288975