javascript - 提取通过js中的数组传递的选择框文本

Question

我有这个代码:

<script>
var paesi = ["Austria","Belgium","Bulgaria","Croatia","Cyprus","Czech Republic","Denmark","Estonia","Finland","France","Germany","Greece","Hungary","Ireland","Italy","Latvia","Lithuania","Luxembourg","Malta","Netherlands","Poland","Portugal","Romania","Slovakia","Slovenia","Spain","Sweden","United Kingdom"];
var sel = document.getElementById('country');
for (var i = 0; i < paesi.length; i++) {
     var opt = document.createElement('option');
     opt.innerHTML = paesi[i];
     opt.value = paesi[i];
     sel.appendChild(opt);
}

该数组位于:

<div id="seleziona-nazione"><span><strong>Seleziona nazione</strong></span></div> 
<br /><br />  <br /><br />
<select id="country"></select>
<button id="button1">seleziona</button>

我希望当我单击button1时，selectedbox中的文本被读取，然后我可以执行一些操作。我尝试这样做，但不起作用:

function scelta() {
    document.getElementById("button1").addEventListener("click", function (paesi) {
        if (document.getElementById('country').text = 'Austria') {
        myLatLng = { lat: 47.516231, lng: 14.550072 };

         centra();
        };
    });
};

myLatLng 是一个全局变量。有人能帮我吗？

Answer 1

在点击事件中，您应该使用value而不是text，并使用==而不是=条件

document.getElementById("button1").addEventListener("click", function (paesi) {

  if (document.getElementById('country').value == 'Austria') {
    myLatLng = { lat: 47.516231, lng: 14.550072 };

    centra();
  };

});

https://jsfiddle.net/egtLvwvw/1/