From d1b3570e47f9c966a8c0f4a955ee9800a53414ef Mon Sep 17 00:00:00 2001
From: mertsincan <sincan.mert@gmail.com>
Date: Sun, 20 Sep 2020 23:27:44 +0300
Subject: [PATCH] Fixed #1585 - InputNumber feature - allow negative values

---
 src/components/inputnumber/InputNumber.js | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/components/inputnumber/InputNumber.js b/src/components/inputnumber/InputNumber.js
index d510a3acea..a47ae75015 100644
--- a/src/components/inputnumber/InputNumber.js
+++ b/src/components/inputnumber/InputNumber.js
@@ -476,6 +476,10 @@ export class InputNumber extends Component {
         }
     }
 
+    allowMinusSign() {
+        return this.props.min === null || this.props.min < 0;
+    }
+
     isMinusSign(char) {
         if (this._minusSign.test(char)) {
             this._minusSign.lastIndex = 0;
@@ -495,6 +499,12 @@ export class InputNumber extends Component {
     }
 
     insert(event, text, sign = { isDecimalSign: false, isMinusSign: false }) {
+        const minusCharIndexOnText = text.search(this._minusSign);
+        this._minusSign.lastIndex = 0;
+        if (!this.allowMinusSign() && minusCharIndexOnText !== -1) {
+            return;
+        }
+
         const selectionStart = this.inputEl.selectionStart;
         const selectionEnd = this.inputEl.selectionEnd;
         let inputValue = this.inputEl.value.trim();