在react-router使用過(guò)程中
好奇其單頁(yè)是如何不刷新頁(yè)面的

        if (canUseHistory) {
          globalHistory.pushState({ key, state }, null, href); //html5的api 改變href不改變頁(yè)面

          if (forceRefresh) {
            window.location.href = href;//刷新頁(yè)面，發(fā)起加載頁(yè)面請(qǐng)求
          } else {
            const prevIndex = allKeys.indexOf(history.location.key);
            const nextKeys = allKeys.slice(
              0,
              prevIndex === -1 ? 0 : prevIndex + 1
            );

            nextKeys.push(location.key);
            allKeys = nextKeys;

            setState({ action, location });
          }
        }