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file.js (402B)

      1 /**
      2  * Reads the textual content of the given file.
      3  *
      4  * @param  {File} file        File.
      5  * @return {Promise<string>}  Content of the file.
      6  */
      7 export function readTextFile( file ) {
      8     const reader = new window.FileReader();
      9     return new Promise( ( resolve ) => {
     10         reader.onload = function() {
     11             resolve( reader.result );
     12         };
     13         reader.readAsText( file );
     14     } );
     15 }