In my Angular v5 project, I have a situation where I need to adjust the import path based on the environment. For example, I have an OwnedSetContractABI file located in different folders for each environment - dev and production. In dev environment, the path is '../constant/dev/OwnedSetContractABI', and in production environment, the path is '../constant/production/OwnedSetContractABI'. However, ES6 does not allow variables in import syntax. How can I work around this limitation?
One way to manage different configurations in Angular is by defining multiple configurations inside your angular.json file.
"production": {
"fileReplacements": [
{
"replace": "src/environments/environment.ts",
"with": "src/environments/environment.prod.ts"
}
]
},
"dev": {
"fileReplacements": [
{
"replace": "src/environments/environment.ts",
"with": "src/environments/environment.dev.ts"
}
]
}
In each environment file, you can import a specific OwnedSetABI from different directories like in environment.prod.ts.
export * from './prod/OwnedSetContractABI';
Simply import the environment variable in your code:
import {environment} from '../environments/environment';
Then, build and serve for the desired configuration (either dev or prod) using the commands:
ng build --env=production
or
ng serve --env=production
Make sure to review your angular.json file by using ctrl + f to search for "fileReplacements". The answer you are seeking should be found there.
To summarize, Angular allows you to specify what should replace the environment.ts file based on the environment.
Place any environment-specific variables in these designated files with matching names, and they will automatically be substituted during serve or build processes. Simply import these files into environment.ts (the one slated for replacement).
To solve the issue, I made a simple change by swapping out the import keyword for require.
Just replace the following:
import { OwnedSetABI } from
`../constant/${environment.envName}/OwnedSetContractABI`;
with:
const OwnedSetABI = require(`../constant/${environment.envName}/OwnedSetContractABI`);
Appreciate it.
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