One scenario is if you receive a string value from the server and have an enum type with string values defined. In TypeScript, how can you convert the string value to the enum type?
export enum ToolType {
ORA= 'orange', ST= 'stone' , DP= 'dupe'
}
const stringFromServer='orange';
// You need to transfer it to ToolType.ORA
To receive ORA if stringFromServer='orange' or ST if stringFromServer = 'stone'
You can achieve this by utilizing JavaScript's Filter function to check for your specific condition and return true when it matches, otherwise false. This will result in an array with the desired data.
var value = 'orange';
let enums = Object.keys(ToolType).filter(x =>
{
if(ToolType[x] === value){
return true;
}
return false;
});
The array enums will contain:
enums[0] = ORA
For a demonstration, you can visit the following link:
When the server transmits an enum, it actually transmits a numerical representation of that enum rather than its actual types.
One way to handle this is by defining your enum like so:
type ToolType = 'Apple' | 'Rock' | 'Copy';const receivedString: ToolType = 'Apple';Your client needs to be aware of the specific numerical values assigned to each value in the enum.
You might consider adjusting your server to send the string name of the enum instead and then using the code snippet provided above.
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