[英]Multiple select option to a textarea
我仍在学习javascript,当前应用程序有问题
通过这个小提琴 ,它不起作用,但是可以大致显示出我想要实现的目标。
如果选择Banana&Mouse,我的输出将是:
香蕉是黄色的
鼠标很小
我想知道如何只需单击一下按钮就可以调用第二个函数,以及在这种情况下如何重用代码,因为最后还有另外5个选择选项。
谢谢!
您可以将id作为参数传递给函数,并相应地操作每个元素值。
function displayResult (fruitId,sizeId) {
var selTag = document.getElementById(fruitId);
var fruit=selTag.options[selTag.selectedIndex].text;
if (fruit=="Apple") {
fruit = fruit + " is red";
} else if (fruit=="Orange") {
fruit = fruit + " is orange";
} else if (fruit=="Banana") {
fruit = fruit + " is yellow";
}
selTag = document.getElementById(sizeId);
var animal=selTag.options[selTag.selectedIndex].text;
if (animal=="Elephant") {
animal = animal + " is big";
} else if (animal=="Mouse") {
animal = animal + " is small";
} else if (animal=="Whale") {
animal = animal + " is enormous";
}
document.getElementById('mytextbox').value = fruit+"\n"+animal;;
}
您可以简化它。 但是这就是您想要的链接
function displayResult (selId) {
var selTag = document.getElementById(selId);
var fruit=selTag.options[selTag.selectedIndex].text;
if (fruit=="Apple") {
fruit = fruit + " is red";
} else if (fruit=="Orange") {
fruit = fruit + " is orange";
} else if (fruit=="Banana") {
fruit = fruit + " is yellow";
}
document.getElementById('mytextbox').value = fruit;
animalText();
}
function animalText(){
var selTag = document.getElementById("size");
var _size=selTag.options[selTag.selectedIndex].text;
if (_size=="Elephant") {
_size = _size + " is big";
} else if (_size=="Mouse") {
_size = _size + " is small";
} else if (_size=="Whale") {
_size = _size + " is enormous";
}
document.getElementById('mytextbox').value = document.getElementById('mytextbox').value +"\n"+ _size;
}
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