require() 不适用于变量 - 反应原生 [英] require() not working with variable - react native
问题描述
我遇到了一个奇怪的问题.如果我设置一个变量 direclty,其值类似于const myString = 'someWord';"那行得通,但如果我从这样的变量const myString = someVariable;"中获取值,那将不起作用,并且如果我将值设置在也不起作用的条件块上.
I meet a weird problem. If I set a variable direclty with a value like this "const myString = 'someWord';" that work but if I take the value from a variable like this "const myString = someVariable;", that doesn't work, and if I set the value on a conditional block that doesn't work too.
所以,工作:
var jsonName = 'tramwayen';
const pathex = require('../assets/JSON/' + jsonName);
var json = JSON.parse(JSON.stringify(pathex));
不起作用:
var jsonName = variable;
const pathex = require('../assets/JSON/' + jsonName);
var json = JSON.parse(JSON.stringify(pathex));
不起作用:
var jsonName = '';
if (condition) {
jsonName = 'tramwayen';
}
const pathex = require('../assets/JSON/' + jsonName);
var json = JSON.parse(JSON.stringify(pathex));
我真的不明白.
我有这个错误:第 41 行的调用无效:require('../assets/JSON/' + jsonName2)"
I have this error : "Invalid call at line 41: require('../assets/JSON/' + jsonName2)"
推荐答案
大多数 JS 打包器无法处理动态 require
导入.您可能希望加载所有文件,并将它们放入一个对象中:
Most JS bundlers cannot handle dynamic require
imports. You might want to load all of the files, and put them in an object:
let data = {
tramwayen: require('../assets/JSON/tramwayen.json'),
something: require('../assets/JSON/something.json'),
// and so on
};
并使用 data
对象检索您需要的数据.
And use the data
object to retrieve the data you need.
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