Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
276 views
in Technique[技术] by (71.8m points)

arrays - how to filter Drop down in javascript

I am having

const Fruits = [
{ name: "Apple", code: "1" },
{ name: "Orange", code: "2" },
{ name: "Mango", code: "3" },
{ name: "Derry", code: "4" }

];

const SelectedFruits=[]

if user selects Apple from drop down i need to remove it from Fruits and add it to SelectedFruits like priority wise he can change them please help me and again if user can change the priority.

question from:https://stackoverflow.com/questions/66058275/how-to-filter-drop-down-in-javascript

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

Hope this is what you are looking for !!

const Fruits = [
{ name: "Apple", code: "1" },
{ name: "Orange", code: "2" },
{ name: "Mango", code: "3" },
{ name: "Derry", code: "4" }
];

const fruitsSel = document.querySelector('#fruits');

Fruits.forEach(function(item, index, array) {
   var opt = document.createElement("option");
   opt.text = item.name;
   opt.value = item.code;
   fruitsSel.add(opt);
});

const SelectedFruits=[];
const remainingFruits = [];
fruitsSel.addEventListener('change',(e)=>{
        const val = e.target.value;
    const selectedFruit = Fruits.filter(fruit=>fruit.code===val);
    SelectedFruits.push(...selectedFruit);
    const remFruits = Fruits.filter(fruit=>fruit.code!==val);
    remainingFruits.push(...remFruits);
    console.log({'selected fruit' : selectedFruit})
    console.log({'remaining fruits' : remFruits})
})
<select id='fruits'>
  
</select>

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...