Filereader or IE9 alternative

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The Filereader object allows web applications to asymptotically read the contents of the files (or pure data buffers) of the user’s computer. The following supported browser are:

Firefox (Gecko) - 3.6 (1.9.2) 
Chrome - 7 
Internet Explorer - 10     
Opera - 12.02
Safari - 6.0.2

I am developing an import where I read a file and turn it into Base64 that to IE10 works perfectly, need the same solution for IE9.

javascript

3 answers

2

You can check if Filereader is browser-enabled and if you are not using an alternative option:

if ('FileReader' in window) {
  // Faça algo se FireReader for suportado
} else {
  // Faça algo caso o FireReader não for suportado.
}

Possible solution compatible with IE8 > Filereader Remember, this solution uses jQuery and Flash.

Reference: How to get Cross Browser Compatibilty for window.fileReader API of HTML5

  • I saw that there is Activexobject would be a better solution?

2

According to the documentation of MDN of API File is supported by the following browsers:

  • Chrome version 13
  • Firefox (Gecko) version 3.0 (1.9)
  • Internet Explorer version 10.0
  • Opera version 11.5 (Presto)
  • Safari (Webkit) version 6.0

So natively you won’t be able to solve this, because it’s a limitation (hadn’t been implemented yet), however there are fallbacks, for example in Flash.

Many keep talking Flash will die or died, ok agree, but this is a case of disuse and not that died for real, still at Desktops you can use it as fallback for various things

An example of great alternatives:

See more Polyfills in the repository of Modernizr:

1

First I’d like to remind you of the greatest achievement in years:

Internet Explorer End of Support

So why does it support a browser that is no longer supported by the manufacturer?

In any case, you can use a Polyfill for the File API:

  • I saw that there is Activexobject would be a better solution?

  • If you do not want to support other browsers such as Chrome, Opera, Firefox and MS Edge, it is an option, but do not recommend

  • Would you have an example of how to implement using Activexobject? Because it always gives the error "The automation server cannot create object".

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