Disregard words in the input

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Disregard words in the input

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#1 by (1 votes)

3

I would like to know how to override / disregard certain words placed by users in the input.

I have an input where the person should send me the URL of a website, in case they should send the url as site.com/image because I have a script that takes the rest of the information.

But it happens that people put things like site.com/image1.jpg, site.com/image2.jpg site.com/image3.jpg into the input and so error.

My question is how do I CANCEL CERTAIN WORDS IN INPUT like: imagen1.jpg, imagen2.jpg. So the weight can send the wrong link but the script would disregard these series of wrong words. Or the escript could do a replace and substitute certain words with a blank space (tmb resolver)

I tried this script: link But in practice it does not work when I click the submit button sorry for the difficulty of expressing myself I'm starting programming.

My input code:

<form action="thumbs.php" method="post">
URL da thumb: <input type="text" class="restrict"  name="url"><br>
<input  type="submit">
</form>

javascript jquery input text

asked by anonymous 20.02.2017 / 05:11

1 answer

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score 1 · Accepted Answer

The form that came to mind is using ER(expressão regular) and method replace() .

<form action="" method="post">
URL da thumb: <input type="text" class="restrict"  name="url" value=""/><br/>
<input  type="submit" onclick="replaceURL()" value="Enviar"/>
</form>
<script>
function replaceURL()
{	var inputURL = document.getElementsByClassName("restrict")[0].value;//captura o valor do input
	var replaceurl = inputURL.replace(/\.[\d]{1,2}\.jpg/, " ");//substitui o valor capturado pela "ER" por " "
	/* "ER" explicação
	 * "\." encontra o "." literalmente uma vez que ele é um operador é necessária a "\" para escapar e torná-lo literal
	 * "[\d]{1,2}" encontra o número em uma ou duas ocorrências dentro da lista [\d] que por sua vez é uma abreviação para os dígitos[0-9]
	 * "\.jpg" encontra a extensão(repara na "\" novamente para escapar o ponto)
	 *  */
	var inputFianl = document.getElementsByClassName("restrict")[0].value = replaceurl;//atribui o resultado da substituição ao valor do input
	alert("O valor atual do input é : "+inputFianl);//alerta o resultado final, só para você ver pois após o submit a pagina é recarregada pois o action=""
}	 
</script>