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Metodo HTML canvas addColorStop()

❮ Oggetto Tela

Esempio

Definisci un gradiente che va dal nero al bianco, come stile di riempimento per il rettangolo:

Il tuo browser non supporta il canvastag HTML5.

JavaScript:

var c = document.getElementById('myCanvas');
var ctx = c.getContext('2d');

var grd = ctx.createLinearGradient(0, 0, 170, 0);
grd.addColorStop(0, "black");
grd.addColorStop(1, "white");

ctx.fillStyle = grd;
ctx.fillRect(20, 20, 150, 100);

Supporto del browser

I numeri nella tabella specificano la prima versione del browser che supporta completamente il metodo.

Method
addColorStop() 4.0 9.0 3.6 4.0 10.1

Definizione e utilizzo

Il metodo addColorStop() specifica i colori e la posizione in un oggetto gradiente.

Il metodo addColorStop() viene utilizzato insieme a createLinearGradient() o createRadialGradient() .

Nota: puoi chiamare più volte il metodo addColorStop() per modificare una sfumatura. Se ometti questo metodo per gli oggetti sfumatura, la sfumatura non sarà visibile. Devi creare almeno un punto di colore per avere una sfumatura visibile.

sintassi JavaScript: gradiente .addColorStop ( stop , colore );

Valori dei parametri

Parameter Description Play it
stop A value between 0.0 and 1.0 that represents the position between start and end in a gradient
color A CSS color value to display at the stop position


Altri esempi

Esempio

Definisci un gradiente con più metodi addColorStop():

Il tuo browser non supporta il tag canvas.

JavaScript:

var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");

var grd = ctx.createLinearGradient(0, 0, 170, 0);
grd.addColorStop(0, "black");
grd.addColorStop("0.3", "magenta");
grd.addColorStop("0.5", "blue");
grd.addColorStop("0.6", "green");
grd.addColorStop("0.8", "yellow");
grd.addColorStop(1, "red");

ctx.fillStyle = grd;
ctx.fillRect(20, 20, 150, 100);

❮ Oggetto Tela