React: Create React App not working in Internet explorer

React: Create React App not working in Internet explorer

I faced this issue today. When I created a new react application using CRA. It was not working in internet explorer browser. I solved it by using polyfills. I followed below steps

1. installed react-app-polyfill

yarn add react-app-polyfill --save


2. imported it in index.js (should be first line)

import 'react-app-polyfill/ie11'; 

import 'react-app-polyfill/stable';

3. Updated browsers in package.json

"browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "ie 11",
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  }

4. Deleted node_modules 

5 yarn and yarn start. Worked !!!

Automate Search in Excel Sheet Using Internet Explorer ActiveXObject

Today I got an assignment to search a number of words in two excel sheets. The work was very boring. So I thought of automating the search. I created web page which will accept the keywords and excel sheets and will show whether keywords are present or not. I used activex object and hence it will run only in ie.

References:

http://stackoverflow.com/questions/8075593/javascript-find-index-of-some-value-in-excel-from-javascript

http://stackoverflow.com/questions/14446447/javascript-read-local-text-file