# SYNOPSIS
A sync prompt for node. very simple. no C++ bindings and no bash scripts.
Works on Linux, OS X and Windows.
# BASIC MODE
```js
var prompt = require('prompt-sync')();
//
// get input from the user.
//
var n = prompt('How many more times? ');
```
# WITH HISTORY
History is an optional extra, to use simply install the history plugin.
```sh
npm install --save prompt-sync-history
```
```js
var prompt = require('prompt-sync')({
history: require('prompt-sync-history')() //open history file
});
//get some user input
var input = prompt()
prompt.history.save() //save history back to file
```
See the [prompt-sync-history](http://npm.im/prompt-sync-history) module
for options, or fork it for customized behaviour.
# API
## `require('prompt-sync')(config) => prompt`
Returns an instance of the `prompt` function.
Takes `config` option with the following possible properties
`sigint`: Default is `false`. A ^C may be pressed during the input process to abort the text entry. If sigint it `false`, prompt returns `null`. If sigint is `true` the ^C will be handled in the traditional way: as a SIGINT signal causing process to exit with code 130.
`eot`: Default is `false`. A ^D pressed as the first character of an input line causes prompt-sync to echo `exit` and exit the process with code 0.
`autocomplete`: A completer function that will be called when user enters TAB to allow for autocomplete. It takes a string as an argument an returns an array of strings that are possible matches for completion. An empty array is returned if there are no matches.
`history`: Takes an object that supplies a "history interface", see [prompt-sync-history](http://npm.im/prompt-sync-history) for an example.
## `prompt(ask, value, opts)`
`ask` is the label of the prompt, `value` is the default value
in absence of a response.
The `opts` argument can also be in the first or second parameter position.
Opts can have the following properties
`echo`: Default is `'*'`. If set the password will be masked with the specified character. For hidden input, set echo to `''` (or use `prompt.hide`).
`autocomplete`: Overrides the instance `autocomplete` function to allow for custom
autocompletion of a particular prompt.
`value`: Same as the `value` parameter, the default value for the prompt. If `opts`
is in the third position, this property will *not* overwrite the `value` parameter.
`ask`: Sames as the `value` parameter. The prompt label. If `opts` is not in the first position, the `ask` parameter will *not* be overridden by this property.
## `prompt.hide(ask)`
Convenience method for creating a standard hidden password prompt,
this is the same as `prompt(ask, {echo: ''})`
# LINE EDITING
Line editing is enabled in the non-hidden mode. (use up/down arrows for history and backspace and left/right arrows for editing)
History is not set when using hidden mode.
# EXAMPLES
```js
//basic:
console.log(require('prompt-sync')()('tell me something about yourself: '))
var prompt = require('prompt-sync')({
history: require('prompt-sync-history')(),
autocomplete: complete(['hello1234', 'he', 'hello', 'hello12', 'hello123456']),
sigint: false
});
var value = 'frank';
var name = prompt('enter name: ', value);
console.log('enter echo * password');
var pw = prompt({echo: '*'});
var pwb = prompt('enter hidden password (or don\'t): ', {echo: '', value: '*pwb default*'})
var pwc = prompt.hide('enter another hidden password: ')
var autocompleteTest = prompt('custom autocomplete: ', {
autocomplete: complete(['bye1234', 'by', 'bye12', 'bye123456'])
});
prompt.history.save();
console.log('\nName: %s\nPassword *: %s\nHidden password: %s\nAnother Hidden password: %s', name, pw, pwb, pwc);
console.log('autocomplete2: ', autocompleteTest);
function complete(commands) {
return function (str) {
var i;
var ret = [];
for (i=0; i< commands.length; i++) {
if (commands[i].indexOf(str) == 0)
ret.push(commands[i]);
}
return ret;
};
};
```
