Parse autoType query parameter (#2)

* Parse autoType query parameter * Add usage notes
michigandaily · Oct 14, 2022 · d0a1e30 · d0a1e30
1 parent 95fea80
commit d0a1e30
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diff --git a/README.md b/README.md
@@ -1,6 +1,6 @@
 # parcel-transformer-csv
 
-CSV transformer for Parcel 2
+CSV transformer for Parcel 2 using [`d3-dsv`](https://github.com/d3/d3-dsv)
 
 ## Usage
 
@@ -17,3 +17,15 @@ CSV transformer for Parcel 2
     }
    }
    ```
+
+Now, you can import a CSV file like so:
+
+```javascript
+import data from "../data.csv"
+```
+
+By default, this transformer will use [`d3.autoType`](https://github.com/d3/d3-dsv#autoType) to infer data types. If you want to disable automatic typing, import with a `autoType=false` query parameter:
+
+```javascript
+import data from "../data.csv?autoType=false"
+```
diff --git a/package.json b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@michigandaily/parcel-transformer-csv",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "description": "CSV transformer for Parcel 2",
   "repository": "https://github.com/MichiganDaily/parcel-transformer-csv",
   "author": "erxclau <ericlau41802@gmail.com>",

diff --git a/src/index.js b/src/index.js
@@ -4,9 +4,16 @@ module.exports = new Transformer({
   async transform({ asset }) {
     const code = await asset.getCode();
     asset.type = "js";
+    let parseFunction = `csvParse(\`${code}\`, autoType)`;
+    if (
+      asset.query.has("autoType") &&
+      asset.query.get("autoType") === "false"
+    ) {
+      parseFunction = `csvParse(\`${code}\`)`;
+    }
     asset.setCode(`
       import { csvParse, autoType } from "d3-dsv";
-      export default csvParse(\`${code}\`, autoType);
+      export default ${parseFunction};
     `);
     return [asset];
   },