Kalkulator pembangunan JavaScript kod JS

HTML telah diperkenalkan lebih awal Mari kita bercakap tentang cara menulis kod JS:

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
      <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no">
    <meta name="format-detection" content="telephone=no" />
    <title>计算器</title>
     <script type="text/javascript" src=""></script>
     <script>
 
  //点击按钮执行操作
  var resultDom = document.getElementById("result");   //var 是定义变量,
  var operate = true;                                 //定义一个变量,防止运算符的连续操作
  var xop = true;                                     //定义一个变量,防止小数点可以连续输出
  function command(num){                            //function 是封装command
    if(needclear==1){
      needclear=0;
      resultDom.value='';
    }
    var str = resultDom.value;                          
    str =(str =="0"?"":str);
    resultDom.value = str+num;
    operate = true;
    play(num);
  }
  
  //清空
  function clearzero(m){
      resultDom.value = 0;
 play(m)
  }
  
  //计算等号
  var needclear=0;
  function equal(m){
    needclear=1;
    var result = resultDom.value.toString();
    var r = eval(result);
    resultDom.value =r;
    play(m);
  }
  
  //小数点
  function dot(m){
  if(xop){                                             //对变量进行判断输出
  var num = resultDom.value.toString();
  num +=".";
  resultDom.value = num;
  xop = ture;
  }
  play(m);
  }
  
  
  //点击操作符
  function tools(op,m){
  if(operate){                                       //对运算符进行判断输出
  var num = resultDom.value;
  num = (num =="0"?"":num);
  resultDom.value = num+op;
  operate = false;
  }
  play(m);
  }
  
  //按键声音
  function play(num){
      var audioDom = document.getElementById("audio");
      audioDom.innerHTML = "<embed src='wav/"+num+".wav' width='0' height='0'></embed>"  //wav是声音素材的文件夹名称。
  }
  
  </script>
</body>
</html>

Setiap fungsi akan mempunyai ulasan. Memandangkan bahan suara tidak boleh dimuat naik, anda hanya perlu tahu cara menulisnya Anda boleh memuat turun bahan suara dalam talian dan mencubanya sendiri.

Meneruskan pembelajaran
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<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"> <meta name="format-detection" content="telephone=no" /> <title>计算器</title> <script type="text/javascript" src=""></script> <script> //点击按钮执行操作 var resultDom = document.getElementById("result"); //var 是定义变量, var operate = true; var xop = true; function command(num){ if(needclear==1){ needclear=0; resultDom.value=''; } var str = resultDom.value; str =(str =="0"?"":str); resultDom.value = str+num; operate = true; play(num); } //清空 function clearzero(m){ resultDom.value = 0; play(m) } //计算等号 var needclear=0; function equal(m){ needclear=1; var result = resultDom.value.toString(); var r = eval(result); resultDom.value =r; play(m); } //小数点 function dot(m){ if(xop){ var num = resultDom.value.toString(); num +="."; resultDom.value = num; xop = ture; } play(m); } //点击操作符 function tools(op,m){ if(operate){ var num = resultDom.value; num = (num =="0"?"":num); resultDom.value = num+op; operate = false; } play(m); } //按键声音 function play(num){ var audioDom = document.getElementById("audio"); audioDom.innerHTML = "<embed src='wav/"+num+".wav' width='0' height='0'></embed>" } </script> </body> </html>
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