En JavaScript hay muchas formas para eliminar los espacios de una cadena de texto, dependiendo de su necesidad podrá usar un método u otro.
Tabla de Contenido:
replace()para reemplazar los espacios en blanco.- trim() para eliminar los espacios a los extremos.
split()yjoin()para reemplazar los espacios en blanco.
Video Tutorial:
Usando replace():
Este método devuelve una nueva cadena con algunas o todas las coincidencias reemplazadas; podemos utilizarlo para buscar los espacios de una cadena y reemplazarlo por un valor diferente.
replace() se llama directamente desde la cadena, y requiere dos valores para funcionar PATRON y REEMPLAZO.
Sintaxis:
String.replace(PATRON, REEMPLAZO)PATRON puede ser una cadena o un objeto RegExp, que será reemplazado por REEMPLAZO.
REEMPLAZO puede ser una cadena o una función que será llamada para cada coincidencia y colocarla en lugar de PATRON.
Ejemplo 1:
string.replace(/ /g, «»); esta expresión regular contiene un espacio en blanco (» «), y la propiedad global.
Esto buscara todos los espacios en blanco de una cadena y los reemplazara por una cadena vacía.
var cadena = 'remover los espacios vacios de una cadena';
var cadena2 = cadena.replace(/ /g, "");
console.log(cadena2);
//removerlosespaciosvaciosdeunacadenaEjemplo 2:
string.replace(/\s+/g, »); esta expresión regular ‘\s’, hace referencia a cualquier símbolo de espacio en blanco: espacios, tabulaciones o saltos de líneas.
var cadena = `
remover
los espacios vacios
de una cadena`;
var cadena2 = cadena.replace(/\s+/g, '');
console.log(cadena2);
//removerlosespaciosvaciosdeunacadenaUsando trim():
Este método elimina los espacios en blanco o vacíos en ambos extremos de una cadena.
Los espacios en blanco en este contexto, hace referencia a todos los caracteres sin contenido como: espacios, tabulaciones, etc.
trim() se llama directamente desde la cadena, y no requiere ningún parámetro adicional para funcionar.
Sintaxis:
String.trim()Ejemplo:
var cadena = ' remover extremos de una cadena ';
var cadena = cadena.trim();
console.log(cadena);
//remover extremos de una cadenaUsando split() y join() juntos:
El método split() divide una cadena en array, y devuelve un nuevo array. *requiere un carácter como delimitador.
El método join() concadena un array, y devuelve una nueva cadena.
Usamos split para dividir una cadena en un array con un carácter de espacio vacío » » como delimitador, después con join() convertimos el array en una cadena.
Ejemplo:
var cadena = 'remover los espacios vacios de una cadena';
var cadena2 = cadena.split(" ").join("");
console.log(cadena2);
//removerlosespaciosvaciosdeunacadena
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