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    Função javascript para deixar a primeira letra de cada palavra maiúscula
  
        
  
    
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  | 'use strict'; | |
| // Captura os parâmetros passados após o nome do arquivo | |
| var name = process.argv.splice(2, process.argv.length -1); | |
| name = wordUpper(name).join(' '); | |
| console.log(name); | |
| function wordUpper(arrWords) { | |
| var ignore = ['de', 'da', 'das', 'do', 'dos']; | |
| for (var i in arrWords) { | |
| if (ignore.indexOf(arrWords[i]) === -1) { | |
| arrWords[i] = arrWords[i].charAt(0).toUpperCase() + arrWords[i].slice(1); | |
| } | |
| } | |
| return arrWords; | |
| } | 
  
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nesse caso você vai passar o valor do input, seria tipo:
onchange="wordUpper(this.value)"